Hepatitis C Virus Inhibitors

ABSTRACT

The present disclosure relates to compounds, compositions and methods for the treatment of hepatitis C virus (HCV) infection. Also disclosed are pharmaceutical compositions containing such compounds and methods for using these compounds in the treatment of HCV infection.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of U.S. Provisional Application Ser.No. 60/836,999 filed Aug. 11, 2006.

The present disclosure is generally directed to antiviral compounds, andmore specifically directed to compounds which can inhibit the functionof the NS5A protein encoded by Hepatitis C virus (HCV), compositionscomprising such compounds, and methods for inhibiting the function ofthe NS5A protein.

HCV is a major human pathogen, infecting an estimated 170 millionpersons worldwide—roughly five times the number infected by humanimmunodeficiency virus type 1. A substantial fraction of these HCVinfected individuals develop serious progressive liver disease,including cirrhosis and hepatocellular carcinoma.

Presently, the most effective HCV therapy employs a combination ofalpha-interferon and ribavirin, leading to sustained efficacy in 40% ofpatients. Recent clinical results demonstrate that pegylatedalpha-interferon is superior to unmodified alpha-interferon asmonotherapy. However, even with experimental therapeutic regimensinvolving combinations of pegylated alpha-interferon and ribavirin, asubstantial fraction of patients do not have a sustained reduction inviral load. Thus, there is a clear and long-felt need to developeffective therapeutics for treatment of HCV infection.

HCV is a positive-stranded RNA virus. Based on a comparison of thededuced amino acid sequence and the extensive similarity in the 5′untranslated region, HCV has been classified as a separate genus in theFlaviviridae family. All members of the Flaviviridae family haveenveloped virions that contain a positive stranded RNA genome encodingall known virus-specific proteins via translation of a single,uninterrupted, open reading frame.

Considerable heterogeneity is found within the nucleotide and encodedamino acid sequence throughout the HCV genome. At least six majorgenotypes have been characterized, and more than 50 subtypes have beendescribed. The major genotypes of HCV differ in their distributionworldwide, and the clinical significance of the genetic heterogeneity ofHCV remains elusive despite numerous studies of the possible effect ofgenotypes on pathogenesis and therapy.

The single strand HCV RNA genome is approximately 9500 nucleotides inlength and has a single open reading frame (ORF) encoding a single largepolyprotein of about 3000 amino acids. In infected cells, thispolyprotein is cleaved at multiple sites by cellular and viral proteasesto produce the structural and non-structural (NS) proteins. In the caseof HCV, the generation of mature non-structural proteins (NS2, NS3,NS4A, NS4B, NS5A, and NS5B) is effected by two viral proteases. Thefirst one is believed to be a metalloprotease and cleaves at the NS2-NS3junction; the second one is a serine protease contained within theN-terminal region of NS3 (also referred to herein as NS3 protease) andmediates all the subsequent cleavages downstream of NS3, both in cis, atthe NS3-NS4A cleavage site, and in trans, for the remaining NS4A-NS4B,NS4B-NS5A, NS5A-NS5B sites. The NS4A protein appears to serve multiplefunctions, acting as a cofactor for the NS3 protease and possiblyassisting in the membrane localization of NS3 and other viral replicasecomponents. The complex formation of the NS3 protein with NS4A seemsnecessary to the processing events, enhancing the proteolytic efficiencyat all of the sites. The NS3 protein also exhibits nucleosidetriphosphatase and RNA helicase activities. NS5B (also referred toherein as HCV polymerase) is a RNA-dependent RNA polymerase that isinvolved in the replication of HCV.

Compounds useful for treating HCV-infected patients are desired whichselectively inhibit HCV viral replication. In particular, compoundswhich are effective to inhibit the function of the NS5A protein aredesired. The HCV NS5A protein is described, for example, in Tan, S.-L.,Katzel, M. G. Virology 2001, 284, 1-12; and in Park, K.-J.; Choi, S.-H,J. Biological Chemistry 2003.

In a first aspect the present disclosure provides a compound of Formula(I)

or a pharmaceutically acceptable salt thereof, wherein

m and n are independently 0, 1, or 2;

q and s are independently 0, 1, 2, 3, or 4;

u and v are independently 0, 1, 2, or 3;

A and B are selected from phenyl and a six-membered heteroaromatic ringcontaining one, two, or three nitrogen atoms; provided that at least oneof A and B is other than phenyl;

X is selected from O, S, S(O), SO₂, CH₂, CHR⁵, and C(R⁵)₂; provided thatwhen n is 0, X is selected from CH₂, CHR⁵, and C(R⁵)₂;

Y is selected from O, S, S(O), SO₂, CH₂, CHR⁶, and C(R⁶)₂; provided thatwhen m is 0, Y is selected from CH₂, CHR⁶, and C(R⁶)₂;

each R¹ and R² is independently selected from alkoxy, alkoxyalkyl,alkoxycarbonyl, alkyl, arylalkoxycarbonyl, carboxy, formyl, halo,haloalkyl, hydroxy, hydroxyalkyl, —NR^(a)R^(b), (NR^(a)R^(b))alkyl, and(NR^(a)R^(b))carbonyl;

R³ and R⁴ are each independently selected from hydrogen, R⁹—C(O)—, andR⁹—C(S)—;

each R⁵ and R⁶ is independently selected from alkoxy, alkyl, aryl, halo,haloalkyl, hydroxy, and —NR^(a)R^(b), wherein the alkyl can optionallyform a fused three- to six-membered ring with an adjacent carbon atom,wherein the three- to six-membered ring is optionally substituted withone or two alkyl groups;

K⁷ and R⁸ are each independently selected from hydrogen, alkoxycarbonyl,alkyl, arylalkoxycarbonyl, carboxy, haloalkyl, (NR^(a)R^(b))carbonyl,and trialkylsilylalkoxyalkyl; and

each R⁹ is independently selected from alkoxy, alkoxyalkyl,alkoxycarbonyl, alkoxycarbonylalkyl, alkyl, alkylcarbonylalkyl, aryl,arylalkenyl, arylalkoxy, arylalkyl, aryloxyalkyl, cycloalkyl,(cycloalkyl)alkenyl, (cycloalkyl)alkyl, cycloalkyloxyalkyl, haloalkyl,heterocyclyl, heterocyclylalkenyl, heterocyclylalkoxy,heterocyclylalkyl, heterocyclyloxyalkyl, hydroxyalkyl, —NR^(c)R^(d),(NR^(c)R^(d))alkenyl, (NR^(c)R^(d))alkyl, and (NR^(c)R^(d))carbonyl.

In a first embodiment of the first aspect m and n are each 1.

In a second embodiment of the first aspect u and v are eachindependently 0 or 1; and each R¹ and R² is independently selected fromalkyl and halo.

In a third embodiment of the first aspect u and v are each independently0 or 1; and when present, R¹ and/or R² are halo. In a fourth embodimentof the first aspect the halo is fluoro.

In a fifth embodiment of the first aspect X is selected from CH₂, CHR⁵,and C(R⁵)₂; and Y is selected from CH₂, CHR⁶, and C(R⁶)₂.

In a sixth embodiment of the first aspect R⁷ and R⁸ are independentlyselected from hydrogen, haloalkyl, and trialkylsilylalkoxyalkyl. In aseventh embodiment of the first aspect R⁷ and R⁸ are each hydrogen.

In an eighth embodiment of the first aspect q and s are independently 0,1, or 2; and when present, R⁵ and/or R⁶ are halo. In a ninth embodimentof the first aspect each halo is fluoro.

In a tenth embodiment of the first aspect at least one of R³ and R⁴ ishydrogen.

In an eleventh embodiment of the first aspect R³ and R⁴ are eachR⁹—C(O)—. In a twelfth embodiment of the first aspect each R⁹ isindependently selected from alkoxy, alkoxyalkyl, alkyl,alkylcarbonylalkyl, aryl, arylalkenyl, arylalkoxy, arylalkyl,aryloxyalkyl, cycloalkyl, (cycloalkyl)alkyl, cycloalkyloxyalkyl,heterocyclyl, heterocyclylalkyl, hydroxyalkyl, —NR^(c)R^(d),(NR^(c)R^(d))alkenyl, (NR^(c)R^(d))alkyl, and (NR^(c)R^(d))carbonyl. Ina thirteenth embodiment of the first aspect each R⁹ is independentlyselected from alkoxy, arylalkyl, (cycloalkyl)alkyl, heterocyclyl,heterocyclylalkyl, and (NR^(c)R^(d))alkyl.

In a second aspect the present disclosure provides a compound of Formula(II)

or a pharmaceutically acceptable salt thereof, wherein

q and s are independently 0, 1, or 2;

u and v are independently 0 or 1;

X is selected from CH₂, CHR⁵, and C(R⁵)₂;

Y is selected from CH₂, CHR⁶, and C(R⁶)₂;

when present, R¹ and/or R² are halo, wherein each halo is fluoro;

R³ and R⁴ are each R⁹—C(O)—;

when present, R⁵ and/or R⁶ are halo, wherein each halo is fluoro; and

each R⁹ is independently selected from alkoxy, alkoxyalkyl,alkoxycarbonyl, alkoxycarbonylalkyl, alkyl, alkylcarbonylalkyl, aryl,arylalkenyl, arylalkoxy, arylalkyl, aryloxyalkyl, cycloalkyl,(cycloalkyl)alkenyl, (cycloalkyl)alkyl, cycloalkyloxyalkyl, haloalkyl,heterocyclyl, heterocyclylalkenyl, heterocyclylalkoxy,heterocyclylalkyl, heterocyclyloxyalkyl, hydroxyalkyl, —NR^(c)R^(d),(NR^(c)R^(d))alkenyl, (NR^(c)R^(d))alkyl, and (NR^(c)R^(d))carbonyl.

In a third aspect the present disclosure provides a compound of Formula(III)

or a pharmaceutically acceptable salt thereof, wherein

u and v are independently 0 or 1;

A and B are selected from phenyl and a six-membered heteroaromatic ringcontaining one or two nitrogen atoms; provided that at least one of Aand B is other han phenyl;

each R¹ and R² is independently selected from alkyl and halo;

R³ and R⁴ are each independently selected from hydrogen and R⁹—C(O)—;

R⁷ and R⁸ are each independently selected from hydrogen, haloalkyl, andtrialkylsilylalkoxyalkyl; and

each R⁹ is independently selected from alkoxy, arylalkyl,(cycloalkyl)alkyl, heterocyclyl, heterocyclylalkyl, and(NR^(c)R^(d))alkyl.

In a fourth aspect the present disclosure provides a compositioncomprising a compound of Formula (I), or a pharmaceutically acceptablesalt thereof, and a pharmaceutically acceptable carrier. In a firstembodiment of the fourth aspect the composition further comprises one ortwo additional compounds having anti-HCV activity. In a secondembodiment of the fourth aspect at least one of the additional compoundsis an interferon or a ribavirin. In a third embodiment of the fourthaspect the interferon is selected from interferon alpha 2B, pegylatedinterferon alpha, consensus interferon, interferon alpha 2A, andlymphoblastiod interferon tau.

In a fourth embodiment of the fourth aspect the composition furthercomprises one or two additional compounds having anti-HCV activitywherein at least one of the additional compounds is selected frominterleukin 2, interleukin 6, interleukin 12, a compound that enhancesthe development of a type 1 helper T cell response, interfering RNA,anti-sense RNA, Imiqimod, ribavirin, an inosine 5′-monophospatedehydrogenase inhibitor, amantadine, and rimantadine.

In a fourth embodiment of the fourth aspect the composition furthercomprises one or two additional compounds having anti-HCV activitywherein at least one of the additional compounds is effective to inhibitthe function of a target selected from HCV metalloprotease, HCV serineprotease, HCV polymerase, HCV helicase, HCV NS4B protein, HCV entry, HCVassembly, HCV egress, HCV NS5A protein, and IMPDH for the treatment ofan HCV infection.

In a fifth aspect the present disclosure provides a method of treatingan HCV infection in a patient, comprising administering to the patient atherapeutically effective amount of a compound of Formula (I), or apharmaceutically acceptable salt thereof. In a first embodiment of thefifth aspect the method further comprises administering one or twoadditional compounds having anti-HCV activity prior to, after orsimultaneously with the compound of Formula (I), or a pharmaceuticallyacceptable salt thereof. In a second embodiment of the fifth aspect atleast one of the additional compounds is an interferon or a ribavirin.In a third embodiment of the fifth aspect the interferon is selectedfrom interferon alpha 2B, pegylated interferon alpha, consensusinterferon, interferon alpha 2A, and lymphoblastiod interferon tau.

In a fourth embodiment of the fifth aspect the method further comprisesadministering one or two additional compounds having anti-HCV activityprior to, after or simultaneously with the compound of Formula (I), or apharmaceutically acceptable salt thereof, wherein at least one of theadditional compounds is selected from interleukin 2, interleukin 6,interleukin 12, a compound that enhances the development of a type 1helper T cell response, interfering RNA, anti-sense RNA, Imiqimod,ribavirin, an inosine 5′-monophospate dehydrogenase inhibitor,amantadine, and rimantadine.

In a fifth embodiment of the fifth aspect the method further comprisesadministering one or two additional compounds having anti-HCV activityprior to, after or simultaneously with the compound of Formula (I), or apharmaceutically acceptable salt thereof, wherein at least one of theadditional compounds is effective to inhibit the function of a targetselected from HCV metalloprotease, HCV serine protease, HCV polymerase,HCV helicase, HCV NS4B portein, HCV entry, HCV assembly, HCV egress, HCVNS5A protein, and IMPDH for the treatment of an HCV infection.

Other embodiments of the present disclosure may comprise suitablecombinations of two or more of embodiments and/or aspects disclosedherein.

Yet other embodiments and aspects of the disclosure will be apparentaccording to the description provided below.

The compounds of the present disclosure also exist as tautomers;therefore the present disclosure also encompasses all tautomeric forms.

The description of the present disclosure herein should be construed incongruity with the laws and principals of chemical bonding. In someinstances it may be necessary to remove a hydrogen atom in orderaccommodate a substitutent at any given location. For example, in thestructure shown below

R⁸ may be attached to either the carbon atom in the imidazole ring or,alternatively, R⁸ may take the place of the hydrogen atom on thenitrogen ring to form an N-substituted imidazole.

It should be understood that the compounds encompassed by the presentdisclosure are those that are suitably stable for use as pharmaceuticalagent.

It is intended that the definition of any substituent or variable (e.g.,R¹, R², R⁵, R⁶, etc.) at a particular location in a molecule beindependent of its definitions elsewhere in that molecule. For example,when u is 2, each of the two R¹ groups may be the same or different.

All patents, patent applications, and literature references cited in thespecification are herein incorporated by reference in their entirety. Inthe case of inconsistencies, the present disclosure, includingdefinitions, will prevail.

As used in the present specification, the following terms have themeanings indicated:

As used herein, the singular forms “a”, “an”, and “the” include pluralreference unless the context clearly dictates otherwise.

Unless stated otherwise, all aryl, cycloalkyl, and heterocyclyl groupsof the present disclosure may be substituted as described in each oftheir respective definitions. For example, the aryl part of an arylalkylgroup may be substituted as described in the definition of the term‘aryl’.

The term “alkenyl,” as used herein, refers to a straight or branchedchain group of two to six carbon atoms containing at least onecarbon-carbon double bond.

The term “alkenyloxy,” as used herein, refers to an alkenyl groupattached to the parent molecular moiety through an oxygen atom.

The term “alkenyloxycarbonyl,” as used herein, refers to an alkenyloxygroup attached to the parent molecular moiety through a carbonyl group.

The term “alkoxy,” as used herein, refers to an alkyl group attached tothe parent molecular moiety through an oxygen atom.

The term “alkoxyalkyl,” as used herein, refers to an alkyl groupsubstituted with one, two, or three alkoxy groups.

The term “alkoxyalkylcarbonyl,” as used herein, refers to an alkoxyalkylgroup attached to the parent molecular moiety through a carbonyl group.

The term “alkoxycarbonyl,” as used herein, refers to an alkoxy groupattached to the parent molecular moiety through a carbonyl group.

The term “alkoxycarbonylalkyl,” as used herein, refers to an alkyl groupsubstituted with one, two, or three alkoxycarbonyl groups.

The term “alkyl,” as used herein, refers to a group derived from astraight or branched chain saturated hydrocarbon containing from one tosix carbon atoms. In the compounds of the present disclosure, when mand/or n is 1 or 2; X and/or Y is CHR⁵ and/or CHR⁶, respectively, and R⁵and/or R⁶ is alkyl, each alkyl can optionally form a fused three- tosix-membered ring with an adjacent carbon atom to provide one of thestructures shown below:

where z is 1, 2, 3, or 4, w is 0, 1, or 2, and R⁵⁰ is alkyl. When w is2, the two R⁵⁰ alkyl groups may be the same or different.

The term “alkylcarbonyl,” as used herein, refers to an alkyl groupattached to the parent molecular moiety through a carbonyl group.

The term “alkylcarbonylalkyl,” as used herein, refers to an alkyl groupsubstituted with one, two, or three alkylcarbonyl groups.

The term “alkylcarbonyloxy,” as used herein, refers to an alkylcarbonylgroup attached to the parent molecular moiety through an oxygen atom.

The term “alkylsulfanyl,” as used herein, refers to an alkyl groupattached to the parent molecular moiety through a sulfur atom.

The term “alkylsulfonyl,” as used herein, refers to an alkyl groupattached to the parent molecular moiety through a sulfonyl group.

The term “aryl,” as used herein, refers to a phenyl group, or a bicyclicfused ring system wherein one or both of the rings is a phenyl group.Bicyclic fused ring systems consist of a phenyl group fused to a four-to six-membered aromatic or non-aromatic carbocyclic ring. The arylgroups of the present disclosure can be attached to the parent molecularmoiety through any substitutable carbon atom in the group.Representative examples of aryl groups include, but are not limited to,indanyl, indenyl, naphthyl, phenyl, and tetrahydronaphthyl. The arylgroups of the present disclosure are optionally substituted with one,two, three, four, or five substituents independently selected fromalkoxy, alkoxyalkyl, alkoxycarbonyl, alkyl, alkylcarbonyl, a second arylgroup, arylalkoxy, arylalkyl, arylcarbonyl, cyano, halo, haloalkoxy,haloalkyl, heterocyclyl, heterocyclylalkyl, heterocyclylcarbonyl,hydroxy, hydroxyalkyl, nitro, —NR^(x)R^(y), (NR^(x)R^(y))alkyl, oxo, and—P(O)OR₂, wherein each R is independently selected from hydrogen andalkyl; and wherein the alkyl part of the arylalkyl and theheterocyclylalkyl are unsubstituted and wherein the second aryl group,the aryl part of the arylalkyl, the aryl part of the arylcarbonyl, theheterocyclyl, and the heterocyclyl part of the heterocyclylalkyl and theheterocyclylcarbonyl are further optionally substituted with one, two,or three substituents independently selected from alkoxy, alkyl, cyano,halo, haloalkoxy, haloalkyl, and nitro.

The term “arylalkenyl,” as used herein, refers to an alkenyl groupsubstituted with one, two, or three aryl groups.

The term “arylalkoxy,” as used herein, refers to an aryl group attachedto the parent molecular moiety through an alkoxy group.

The term “arylalkoxyalkyl,” as used herein, refers to an alkyl groupsubstituted with one, two, or three arylalkoxy groups.

The term “arylalkoxyalkylcarbonyl,” as used herein, refers to anarylalkoxyalkyl group attached to the parent molecular moiety through acarbonyl group.

The term “arylalkoxycarbonyl,” as used herein, refers to an arylalkoxygroup attached to the parent molecular moiety through a carbonyl group.

The term “arylalkyl,” as used herein, refers to an alkyl groupsubstituted with one, two, or three aryl groups. The alkyl part of thearylalkyl is further optionally substituted with one or two additionalgroups independently selected from alkoxy, alkylcarbonyloxy, halo,haloalkoxy, haloalkyl, heterocyclyl, hydroxy, and —NR^(c)R^(d), whereinthe heterocyclyl is further optionally substituted with one or twosubstituents independently selected from alkoxy, alkyl, unsubstitutedaryl, unsubstituted arylalkoxy, unsubstituted arylalkoxycarbonyl, halo,haloalkoxy, haloalkyl, hydroxy, and —NR^(x)R^(y).

The term “arylalkylcarbonyl,” as used herein, refers to an arylalkylgroup attached to the parent molecular moiety through a carbonyl group.

The term “arylcarbonyl,” as used herein, refers to an aryl groupattached to the parent molecular moiety through a carbonyl group.

The term “aryloxy,” as used herein, refers to an aryl group attached tothe parent molecular moiety through an oxygen atom.

The term “aryloxyalkyl,” as used herein, refers to an alkyl groupsubstituted with one, two, or three aryloxy groups.

The term “aryloxycarbonyl,” as used herein, refers to an aryloxy groupattached to the parent molecular moiety through a carbonyl group.

The term “arylsulfonyl,” as used herein, refers to an aryl groupattached to the parent molecular moiety through a sulfonyl group.

The terms “Cap” and “cap” as used herein, refer to the group which isplaced on the nitrogen atom of the terminal nitrogen-containing ring,i.e., the pyrrolidine rings of compound 1 e. It should be understoodthat “Cap” or “cap” can refer to the reagent used to append the group tothe terminal nitrogen-containing ring or to the fragment in the finalproduct, i.e., “Cap-51” or “The Cap-51 fragment found in LS-19”.

The term “carbonyl,” as used herein, refers to —C(O)—.

The term “carboxy,” as used herein, refers to —CO₂H.

The term “cyano,” as used herein, refers to —CN.

The term “cycloalkyl,” as used herein, refers to a saturated monocyclic,hydrocarbon ring system having three to seven carbon atoms and zeroheteroatoms. Representative examples of cycloalkyl groups include, butare not limited to, cyclopropyl, cyclopentyl, and cyclohexyl. Thecycloalkyl groups of the present disclosure are optionally substitutedwith one, two, three, four, or five substituents independently selectedfrom alkoxy, alkyl, aryl, cyano, halo, haloalkoxy, haloalkyl,heterocyclyl, hydroxy, hydroxyalkyl, nitro, and —NR^(x)R^(y), whereinthe aryl and the heterocyclyl are further optionally substituted withone, two, or three substituents independently selected from alkoxy,alkyl, cyano, halo, haloalkoxy, haloalkyl, hydroxy, and nitro.

The term “(cycloalkyl)alkenyl,” as used herein, refers to an alkenylgroup substituted with one, two, or three cycloalkyl groups.

The term “(cycloalkyl)alkyl,” as used herein, refers to an alkyl groupsubstituted with one, two, or three cycloalkyl groups. The alkyl part ofthe (cycloalkyl)alkyl is further optionally substituted with one or twogroups independently selected from hydroxy and —NR^(c)R^(d).

The term “cycloalkyloxy,” as used herein, refers to a cycloalkyl groupattached to the parent molecular moiety through an oxygen atom.

The term “cycloalkyloxyalkyl,” as used herein, refers to an alkyl groupsubstituted with one, two, or three cycloalkyloxy groups.

The term “cycloalkylsulfonyl,” as used herein, refers to a cycloalkylgroup attached to the parent molecular moiety through a sulfonyl group.

The term “formyl,” as used herein, refers to —CHO.

The terms “halo” and “halogen,” as used herein, refer to F, Cl, Br, orI.

The term “haloalkoxy,” as used herein, refers to a haloalkyl groupattached to the parent molecular moiety through an oxygen atom.

The term “haloalkoxycarbonyl,” as used herein, refers to a haloalkoxygroup attached to the parent molecular moiety through a carbonyl group.

The term “haloalkyl,” as used herein, refers to an alkyl groupsubstituted by one, two, three, or four halogen atoms.

The term “heterocyclyl,” as used herein, refers to a four-, five-, six-,or seven-membered ring containing one, two, three, or four heteroatomsindependently selected from nitrogen, oxygen, and sulfur. Thefour-membered ring has zero double bonds, the five-membered ring haszero to two double bonds, and the six- and seven-membered rings havezero to three double bonds. The term “heterocyclyl” also includesbicyclic groups in which the heterocyclyl ring is fused to anothermonocyclic heterocyclyl group, or a four- to six-membered aromatic ornon-aromatic carbocyclic ring; as well as bridged bicyclic groups suchas 7-azabicyclo[2.2.1]hept-7-yl, 2-azabicyclo[2.2.2]oc-2-tyl, and2-azabicyclo[2.2.2]oc-3-tyl. The heterocyclyl groups of the presentdisclosure can be attached to the parent molecular moiety through anycarbon atom or nitrogen atom in the group. Examples of heterocyclylgroups include, but are not limited to, benzothienyl, furyl, imidazolyl,indolinyl, indolyl, isothiazolyl, isoxazolyl, morpholinyl, oxazolyl,piperazinyl, piperidinyl, pyrazolyl, pyridinyl, pyrrolidinyl,pyrrolopyridinyl, pyrrolyl, thiazolyl, thienyl, thiomorpholinyl,7-azabicyclo[2.2.1]hept-7-yl, 2-azabicyclo[2.2.2]oc-2-tyl, and2-azabicyclo[2.2.2]oc-3-tyl. The heterocyclyl groups of the presentdisclosure are optionally substituted with one, two, three, four, orfive substituents independently selected from alkoxy, alkoxyalkyl,alkoxycarbonyl, alkyl, alkylcarbonyl, aryl, arylalkyl, arylcarbonyl,cyano, halo, haloalkoxy, haloalkyl, a second heterocyclyl group,heterocyclylalkyl, heterocyclylcarbonyl, hydroxy, hydroxyalkyl, nitro,—NR^(x)R^(y), (NR^(x)R^(y))alkyl, and oxo, wherein the alkyl part of thearylalkyl and the heterocyclylalkyl are unsubstituted and wherein thearyl, the aryl part of the arylalkyl, the aryl part of the arylcarbonyl,the second heterocyclyl group, and the heterocyclyl part of theheterocyclylalkyl and the heterocyclylcarbonyl are further optionallysubstituted with one, two, or three substituents independently selectedfrom alkoxy, alkyl, cyano, halo, haloalkoxy, haloalkyl, and nitro.

The term “heterocyclylalkenyl,” as used herein, refers to an alkenylgroup substituted with one, two, or three heterocyclyl groups.

The term “heterocyclylalkoxy,” as used herein, refers to a heterocyclylgroup attached to the parent molecular moiety through an alkoxy group.

The term “heterocyclylalkoxycarbonyl,” as used herein, refers to aheterocyclylalkoxy group attached to the parent molecular moiety througha carbonyl group.

The term “heterocyclylalkyl,” as used herein, refers to an alkyl groupsubstituted with one, two, or three heterocyclyl groups. The alkyl partof the heterocyclylalkyl is further optionally substituted with one ortwo additional groups independently selected from alkoxy,alkylcarbonyloxy, aryl, halo, haloalkoxy, haloalkyl, hydroxy, and—NR^(c)R^(d), wherein the aryl is further optionally substituted withone or two substituents independently selected from alkoxy, alkyl,unsubstituted aryl, unsubstituted arylalkoxy, unsubstitutedarylalkoxycarbonyl, halo, haloalkoxy, haloalkyl, hydroxy, and—NR^(x)R^(y).

The term “heterocyclylalkylcarbonyl,” as used herein, refers to aheterocyclylalkyl group attached to the parent molecular moiety througha carbonyl group.

The term “heterocyclylcarbonyl,” as used herein, refers to aheterocyclyl group attached to the parent molecular moiety through acarbonyl group.

The term “heterocyclyloxy,” as used herein, refers to a heterocyclylgroup attached to the parent molecular moiety through an oxygen atom.

The term “heterocyclyloxyalkyl,” as used herein, refers to an alkylgroup substituted with one, two, or three heterocyclyloxy groups.

The term “heterocyclyloxycarbonyl,” as used herein, refers to aheterocyclyloxy group attached to the parent molecular moiety through acarbonyl group.

The term “hydroxy,” as used herein, refers to —OH.

The term “hydroxyalkyl,” as used herein, refers to an alkyl groupsubstituted with one, two, or three hydroxy groups.

The term “hydroxyalkylcarbonyl,” as used herein, refers to ahydroxyalkyl group attached to the parent molecular moiety through acarbonyl group.

The term “nitro,” as used herein, refers to —NO₂.

The term “—NR^(a)R^(b),” as used herein, refers to two groups, R^(a) andR^(b), which are attached to the parent molecular moiety through anitrogen atom. R^(a) and R^(b) are independently selected from hydrogen,alkenyl, and alkyl.

The term “(NR^(a)R^(b))alkyl,” as used herein, refers to an alkyl groupsubstituted with one, two, or three —NR^(a)R^(b) groups.

The term “(NR^(a)R^(b))carbonyl,” as used herein, refers to an—NR^(a)R^(b) group attached to the parent molecular moiety through acarbonyl group.

The term “—NR^(c)R^(d),” as used herein, refers to two groups, R^(c) andR^(d), which are attached to the parent molecular moiety through anitrogen atom. R^(c) and R^(d) are independently selected from hydrogen,alkenyloxycarbonyl, alkoxyalkylcarbonyl, alkoxycarbonyl, alkyl,alkylcarbonyl, alkylsulfonyl, aryl, arylalkoxycarbonyl, arylalkyl,arylalkylcarbonyl, arylcarbonyl, aryloxycarbonyl, arylsulfonyl,cycloalkyl, cycloalkylsulfonyl, formyl, haloalkoxycarbonyl,heterocyclyl, heterocyclylalkoxycarbonyl, heterocyclylalkyl,heterocyclylalkylcarbonyl, heterocyclylcarbonyl,heterocyclyloxycarbonyl, hydroxyalkylcarbonyl, (NR^(e)R^(f))alkyl,(NR^(e)R^(f))alkylcarbonyl, (NR^(e)R^(f))carbonyl,(NR^(e)R^(f))sulfonyl, —C(NCN)OR′, and —C(NCN)NR^(x)R^(y), wherein R′ isselected from alkyl and unsubstituted phenyl, and wherein the alkyl partof the arylalkyl, the arylalkylcarbonyl, the heterocyclylalkyl, and theheterocyclylalkylcarbonyl are further optionally substituted with one—NR^(e)R^(f) group; and wherein the aryl, the aryl part of thearylalkoxycarbonyl, the arylalkyl, the arylalkylcarbonyl, thearylcarbonyl, the aryloxycarbonyl, and the arylsulfonyl, theheterocyclyl, and the heterocyclyl part of theheterocyclylalkoxycarbonyl, the heterocyclylalkyl, theheterocyclylalkylcarbonyl, the heterocyclylcarbonyl, and theheterocyclyloxycarbonyl are further optionally substituted with one,two, or three substituents independently selected from alkoxy, alkyl,cyano, halo, haloalkoxy, haloalkyl, and nitro.

The term “(NR^(c)R^(d))alkenyl,” as used herein, refers to an alkenylgroup substituted with one, two, or three —NR^(c)R^(d) groups.

The term “(NR^(c)R^(d))alkyl,” as used herein, refers to an alkyl groupsubstituted with one, two, or three —NR^(c)R^(d) groups. The alkyl partof the (NR^(c)R^(d))alkyl is further optionally substituted with one ortwo additional groups selected from alkoxy, alkoxyalkylcarbonyl,alkoxycarbonyl, alkylsulfanyl, arylalkoxyalkylcarbonyl, carboxy,heterocyclyl, heterocyclylcarbonyl, hydroxy, and (NR^(e)R^(f))carbonyl;wherein the heterocyclyl is further optionally substituted with one,two, three, four, or five substituents independently selected fromalkoxy, alkyl, cyano, halo, haloalkoxy, haloalkyl, and nitro.

The term “(NR^(c)R^(d))carbonyl,” as used herein, refers to an—NR^(c)R^(d) group attached to the parent molecular moiety through acarbonyl group.

The term “—NR^(e)R^(f),” as used herein, refers to two groups, R^(e) andR^(f), which are attached to the parent molecular moiety through anitrogen atom. R^(e) and R^(f) are independently selected from hydrogen,alkyl, unsubstituted aryl, unsubstituted arylalkyl, unsubstitutedcycloalkyl, unsubstituted (cyclolalkyl)alkyl, unsubstitutedheterocyclyl, unsubstituted heterocyclylalkyl, (NR^(x)R^(y))alkyl, and(NR^(x)R^(y))carbonyl.

The term “(NR^(e)R^(f))alkyl,” as used herein, refers to an alkyl groupsubstituted with one, two, or three —NR^(e)R^(f) groups.

The term “(NR^(e)R^(f))alkylcarbonyl,” as used herein, refers to an(NR^(e)R^(f))alkyl group attached to the parent molecular moiety througha carbonyl group.

The term “(NR^(e)R^(f))carbonyl,” as used herein, refers to an—NR^(e)R^(f) group attached to the parent molecular moiety through acarbonyl group.

The term “(NR^(e)R^(f))sulfonyl,” as used herein, refers to an—NR^(e)R^(f) group attached to the parent molecular moiety through asulfonyl group.

The term “—NR^(x)R^(y),” as used herein, refers to two groups, R^(x) andR^(y), which are attached to the parent molecular moiety through anitrogen atom. R^(x) and R^(y) are independently selected from hydrogen,alkoxycarbonyl, alkyl, alkylcarbonyl, unsubstituted aryl, unsubstitutedarylalkoxycarbonyl, unsubstituted arylalkyl, unsubstituted cycloalkyl,unsubstituted heterocyclyl, and (NR^(x′)R^(y′))carbonyl, wherein R^(x′)and R^(y′) are independently selected from hydrogen and alkyl.

The term “(NR^(x)R^(y))alkyl,” as used herein, refers to an alkyl groupsubstituted with one, two, or three —NR^(x)R^(y) groups.

The term “oxo,” as used herein, refers to =0.

The term “sulfonyl,” as used herein, refers to —SO₂—.

The term “trialkylsilyl,” as used herein, refers to —SiR₃, wherein R isalkyl. The R groups may be the same or different.

The term “trialkylsilylalkyl,” as used herein, refers to an alkyl groupsubstituted with one, two, or three trialkylsilyl groups.

The term “trialkylsilylalkoxy,” as used herein, refers to atrialkylsilylalkyl group attached to the parent molecular moiety throughan oxygen atom.

The term “trialkylsilylalkoxyalkyl,” as used herein, refers to an alkylgroup substituted with one, two, or three trialkylsilylalkoxy groups.

Asymmetric centers exist in the compounds of the present disclosure.These centers are designated by the symbols “R” or “S”, depending on theconfiguration of substituents around the chiral carbon atom. It shouldbe understood that the disclosure encompasses all stereochemicalisomeric forms, or mixtures thereof, which possess the ability toinhibit NS5A. Individual stereoisomers of compounds can be preparedsynthetically from commercially available starting materials whichcontain chiral centers or by preparation of mixtures of enantiomericproducts followed by separation such as conversion to a mixture ofdiastereomers followed by separation or recrystallization,chromatographic techniques, or direct separation of enantiomers onchiral chromatographic columns. Starting compounds of particularstereochemistry are either commercially available or can be made andresolved by techniques known in the art.

Certain compounds of the present disclosure may also exist in differentstable conformational forms which may be separable. Torsional asymmetrydue to restricted rotation about an asymmetric single bond, for examplebecause of steric hindrance or ring strain, may permit separation ofdifferent conformers. The present disclosure includes eachconformational isomer of these compounds and mixtures thereof.

The term “compounds of the present disclosure”, and equivalentexpressions, are meant to embrace compounds of Formula (I), andpharmaceutically acceptable enantiomers, diastereomers, and saltsthereof. Similarly, references to intermediates are meant to embracetheir salts where the context so permits.

The compounds of the present disclosure can exist as pharmaceuticallyacceptable salts. The term “pharmaceutically acceptable salt,” as usedherein, represents salts or zwitterionic forms of the compounds of thepresent disclosure which are water or oil-soluble or dispersible, whichare, within the scope of sound medical judgment, suitable for use incontact with the tissues of patients without excessive toxicity,irritation, allergic response, or other problem or complicationcommensurate with a reasonable benefit/risk ratio, and are effective fortheir intended use The salts can be prepared during the final isolationand purification of the compounds or separately by reacting a suitablenitrogen atom with a suitable acid. Representative acid addition saltsinclude acetate, adipate, alginate, citrate, aspartate, benzoate,benzenesulfonate, bisulfate, butyrate, camphorate, camphorsulfonate;digluconate, dihydrobromide, diydrochloride, dihydroiodide,glycerophosphate, hemisulfate, heptanoate, hexanoate, formate, fumarate,hydrochloride, hydrobromide, hydroiodide, 2-hydroxyethanesulfonate,lactate, maleate, mesitylenesulfonate, methanesulfonate,naphthylenesulfonate, nicotinate, 2-naphthalenesulfonate, oxalate,palmoate, pectinate, persulfate, 3-phenylproprionate, picrate, pivalate,propionate, succinate, tartrate, trichloroacetate, trifluoroacetate,phosphate, glutamate, bicarbonate, para-toluenesulfonate, andundecanoate. Examples of acids which can be employed to formpharmaceutically acceptable addition salts include inorganic acids suchas hydrochloric, hydrobromic, sulfuric, and phosphoric, and organicacids such as oxalic, maleic, succinic, and citric.

Basic addition salts can be prepared during the final isolation andpurification of the compounds by reacting a carboxy group with asuitable base such as the hydroxide, carbonate, or bicarbonate of ametal cation or with ammonia or an organic primary, secondary, ortertiary amine. The cations of pharmaceutically acceptable salts includelithium, sodium, potassium, calcium, magnesium, and aluminum, as well asnontoxic quaternary amine cations such as ammonium, tetramethylammonium,tetraethylammonium, methylamine, dimethylamine, trimethylamine,triethylamine, diethylamine, ethylamine, tributylamine, pyridine,N,N-dimethylaniline, N-methylpiperidine, N-methylmorpholine,dicyclohexylamine, procaine, dibenzylamine, N,N-dibenzylphenethylamine,and N,N′-dibenzylethylenediamine. Other representative organic aminesuseful for the formation of base addition salts include ethylenediamine,ethanolamine, diethanolamine, piperidine, and piperazine.

When it is possible that, for use in therapy, therapeutically effectiveamounts of a compound of formula (I), as well as pharmaceuticallyacceptable salts thereof, may be administered as the raw chemical, it ispossible to present the active ingredient as a pharmaceuticalcomposition. Accordingly, the disclosure further provides pharmaceuticalcompositions, which include therapeutically effective amounts ofcompounds of formula (I) or pharmaceutically acceptable salts thereof,and one or more pharmaceutically acceptable carriers, diluents, orexcipients. The term “therapeutically effective amount,” as used herein,refers to the total amount of each active component that is sufficientto show a meaningful patient benefit, e.g., a reduction in viral load.When applied to an individual active ingredient, administered alone, theterm refers to that ingredient alone. When applied to a combination, theterm refers to combined amounts of the active ingredients that result inthe therapeutic effect, whether administered in combination, serially,or simultaneously. The compounds of formula (I) and pharmaceuticallyacceptable salts thereof, are as described above. The carrier(s),diluent(s), or excipient(s) must be acceptable in the sense of beingcompatible with the other ingredients of the formulation and notdeleterious to the recipient thereof. In accordance with another aspectof the present disclosure there is also provided a process for thepreparation of a pharmaceutical formulation including admixing acompound of formula (I), or a pharmaceutically acceptable salt thereof,with one or more pharmaceutically acceptable carriers, diluents, orexcipients. The term “pharmaceutically acceptable,” as used herein,refers to those compounds, materials, compositions, and/or dosage formswhich are, within the scope of sound medical judgment, suitable for usein contact with the tissues of patients without excessive toxicity,irritation, allergic response, or other problem or complicationcommensurate with a reasonable benefit/risk ratio, and are effective fortheir intended use.

Pharmaceutical formulations may be presented in unit dose formscontaining a predetermined amount of active ingredient per unit dose.Dosage levels of between about 0.01 and about 250 milligram per kilogram(“mg/kg”) body weight per day, preferably between about 0.05 and about100 mg/kg body weight per day of the compounds of the present disclosureare typical in a monotherapy for the prevention and treatment of HCVmediated disease. Typically, the pharmaceutical compositions of thisdisclosure will be administered from about 1 to about 5 times per day oralternatively, as a continuous infusion. Such administration can be usedas a chronic or acute therapy. The amount of active ingredient that maybe combined with the carrier materials to produce a single dosage formwill vary depending on the condition being treated, the severity of thecondition, the time of administration, the route of administration, therate of excretion of the compound employed, the duration of treatment,and the age, gender, weight, and condition of the patient. Preferredunit dosage formulations are those containing a daily dose or sub-dose,as herein above recited, or an appropriate fraction thereof, of anactive ingredient. Treatment may be initiated with small dosagessubstantially less than the optimum dose of the compound. Thereafter,the dosage is increased by small increments until the optimum effectunder the circumstances is reached. In general, the compound is mostdesirably administered at a concentration level that will generallyafford antivirally effective results without causing any harmful ordeleterious side effects.

When the compositions of this disclosure comprise a combination of acompound of the present disclosure and one or more additionaltherapeutic or prophylactic agent, both the compound and the additionalagent are usually present at dosage levels of between about 10 to 150%,and more preferably between about 10 and 80% of the dosage normallyadministered in a monotherapy regimen.

Pharmaceutical formulations may be adapted for administration by anyappropriate route, for example by the oral (including buccal orsublingual), rectal, nasal, topical (including buccal, sublingual, ortransdermal), vaginal, or parenteral (including subcutaneous,intracutaneous, intramuscular, intra-articular, intrasynovial,intrasternal, intrathecal, intralesional, intravenous, or intradermalinjections or infusions) route. Such formulations may be prepared by anymethod known in the art of pharmacy, for example by bringing intoassociation the active ingredient with the carrier(s) or excipient(s).Oral administration or administration by injection are preferred.

Pharmaceutical formulations adapted for oral administration may bepresented as discrete units such as capsules or tablets; powders orgranules; solutions or suspensions in aqueous or non-aqueous liquids;edible foams or whips; or oil-in-water liquid emulsions or water-in-oilemulsions.

For instance, for oral administration in the form of a tablet orcapsule, the active drug component can be combined with an oral,non-toxic pharmaceutically acceptable inert carrier such as ethanol,glycerol, water, and the like. Powders are prepared by comminuting thecompound to a suitable fine size and mixing with a similarly comminutedpharmaceutical carrier such as an edible carbohydrate, as, for example,starch or mannitol. Flavoring, preservative, dispersing, and coloringagent can also be present.

Capsules are made by preparing a powder mixture, as described above, andfilling formed gelatin sheaths. Glidants and lubricants such ascolloidal silica, talc, magnesium stearate, calcium stearate, or solidpolyethylene glycol can be added to the powder mixture before thefilling operation. A disintegrating or solubilizing agent such asagar-agar, calcium carbonate, or sodium carbonate can also be added toimprove the availability of the medicament when the capsule is ingested.

Moreover, when desired or necessary, suitable binders, lubricants,disintegrating agents, and coloring agents can also be incorporated intothe mixture. Suitable binders include starch, gelatin, natural sugarssuch as glucose or beta-lactose,l corn sweeteners, natural and syntheticgums such as acacia, tragacanth or sodium alginate,carboxymethylcellulose, polyethylene glycol, and the like. Lubricantsused in these dosage forms include sodium oleate, sodium chloride, andthe like. Disintegrators include, without limitation, starch, methylcellulose, agar, betonite, xanthan gum, and the like. Tablets areformulated, for example, by preparing a powder mixture, granulating orslugging, adding a lubricant and disintegrant, and pressing intotablets. A powder mixture is prepared by mixing the compound, suitablecomminuted, with a diluent or base as described above, and optionally,with a binder such as carboxymethylcellulose, an aliginate, gelating, orpolyvinyl pyrrolidone, a solution retardant such as paraffin, aresorption accelerator such as a quaternary salt and/or and absorptionagent such as betonite, kaolin, or dicalcium phosphate. The powdermixture can be granulated by wetting with a binder such as syrup, starchpaste, acadia mucilage, or solutions of cellulosic or polymericmaterials and forcing through a screen. As an alternative togranulating, the powder mixture can be run through the tablet machineand the result is imperfectly formed slugs broken into granules. Thegranules can be lubricated to prevent sticking to the tablet formingdies by means of the addition of stearic acid, a stearate salt, talc, ormineral oil. The lubricated mixture is then compressed into tablets. Thecompounds of the present disclosure can also be combined with a freeflowing inert carrier and compressed into tablets directly without goingthrough the granulating or slugging steps. A clear or opaque protectivecoating consisting of a sealing coat of shellac, a coating of sugar orpolymeric material, and a polish coating of wax can be provided.Dyestuffs can be added to these coatings to distinguish different unitdosages.

Oral fluids such as solution, syrups, and elixirs can be prepared indosage unit form so that a given quantity contains a predeterminedamount of the compound. Syrups can be prepared by dissolving thecompound in a suitably flavored aqueous solution, while elixirs areprepared through the use of a non-toxic vehicle. Solubilizers andemulsifiers such as ethoxylated isostearyl alcohols and polyoxyethylenesorbitol ethers, preservatives, flavor additive such as peppermint oilor natural sweeteners, or saccharin or other artificial sweeteners, andthe like can also be added.

Where appropriate, dosage unit formulations for oral administration canbe microencapsulated. The formulation can also be prepared to prolong orsustain the release as for example by coating or embedding particulatematerial in polymers, wax, or the like.

The compounds of formula (I), and pharmaceutically acceptable saltsthereof, can also be administered in the form of liposome deliverysystems, such as small unilamellar vesicles, large unilamellar vesicles,and multilamellar vesicles. Liposomes can be formed from a variety ofphopholipids, such as cholesterol, stearylamine, or phophatidylcholines.

The compounds of formula (I) and pharmaceutically acceptable saltsthereof may also be delivered by the use of monoclonal antibodies asindividual carriers to which the compound molecules are coupled. Thecompounds may also be coupled with soluble polymers as targetable drugcarriers. Such polymers can include polyvinylpyrrolidone, pyrancopolymer, polyhydroxypropylmethacrylamidephenol,polyhydroxyethylaspartamidephenol, or polyethyleneoxidepolylysinesubstituted with palitoyl residues. Furthermore, the compounds may becoupled to a class of biodegradable polymers useful in achievingcontrolled release of a drug, for example, polylactic acid, polepsiloncaprolactone, polyhydroxy butyric acid, polyorthoesters, polyacetals,polydihydropyrans, polycyanoacrylates, and cross-linked or amphipathicblock copolymers of hydrogels.

Pharmaceutical formulations adapted for transdermal administration maybe presented as discrete patches intended to remain in intimate contactwith the epidermis of the recipient for a prolonged period of time. Forexample, the active ingredient may be delivered from the patch byiontophoresis as generally described in Pharmaceutical Research 1986,3(6), 318.

Pharmaceutical formulations adapted for topical administration may beformulated as ointments, creams, suspensions, lotions, powders,solutions, pastes, gels, sprays, aerosols, or oils.

Pharmaceutical formulations adapted for rectal administration may bepresented as suppositories or as enemas.

Pharmaceutical formulations adapted for nasal administration wherein thecarrier is a solid include a course powder having a particle size forexample in the range 20 to 500 microns which is administered in themanner in which snuff is taken, i.e., by rapid inhalation through thenasal passage from a container of the powder held close up to the nose.Suitable formulations wherein the carrier is a liquid, foradministration as a nasal spray or nasal drops, include aqueous or oilsolutions of the active ingredient.

Pharmaceutical formulations adapted for administration by inhalationinclude fine particle dusts or mists, which may be generated by means ofvarious types of metered, dose pressurized aerosols, nebulizers, orinsufflators.

Pharmaceutical formulations adapted for vaginal administration may bepresented as pessaries, tampons, creams, gels, pastes, foams, or sprayformulations.

Pharmaceutical formulations adapted for parenteral administrationinclude aqueous and non-aqueous sterile injection solutions which maycontain anti-oxidants, buffers, bacteriostats, and soutes which renderthe formulation isotonic with the blood of the intended recipient; andaqueous and non-aqueous sterile suspensions which may include suspendingagents and thickening agents. The formulations may be presented inunit-dose or multi-dose containers, for example sealed ampoules andvials, and may be stored in a freeze-dried (lyophilized) conditionrequiring only the addition of the sterile liquid carrier, for examplewater for injections, immediately prior to use. Extemporaneous injectionsolutions and suspensions may be prepared from sterile powders,granules, and tablets.

It should be understood that in addition to the ingredients particularlymentioned above, the formulations may include other agents conventionalin the art having regard to the type of formulation in question, forexample those suitable for oral administration may include flavoringagents.

The term “patient” includes both human and other mammals.

The term “treating” refers to: (i) preventing a disease, disorder orcondition from occurring in a patient that may be predisposed to thedisease, disorder, and/or condition but has not yet been diagnosed ashaving it; (ii) inhibiting the disease, disorder, or condition, i.e.,arresting its development; and (iii) relieving the disease, disorder, orcondition, i.e., causing regression of the disease, disorder, and/orcondition.

The compounds of the present disclosure can also be administered with acyclosporin, for example, cyclosporin A. Cyclosporin A has been shown tobe active against HCV in clinical trials (Hepatology 2003, 38, 1282;Biochem. Biophys. Res. Commun. 2004, 313, 42; J. Gastroenterol. 2003,38, 567).

Table 1 below lists some illustrative examples of compounds that can beadministered with the compounds of this disclosure. The compounds of thedisclosure can be administered with other anti-HCV activity compounds incombination therapy, either jointly or separately, or by combining thecompounds into a composition.

TABLE 1 Physiological Type of Inhibitor or Source Brand Name ClassTarget Company NIM811 Cyclophilin Novartis Inhibitor ZadaxinImmunomodulator Sciclone Suvus Methylene blue Bioenvision Actilon(CPG10101) TLR9 agonist Coley Batabulin (T67) Anticancer β-tubulininhibitor Tularik Inc., South San Francisco, CA ISIS 14803 Antiviralantisense ISIS Pharmaceuticals Inc, Carlsbad, CA/Elan PhamaceuticalsInc., New York, NY Summetrel Antiviral antiviral Endo PharmaceuticalsHoldings Inc., Chadds Ford, PA GS-9132 (ACH-806) Antiviral HCV InhibitorAchillion/ Gilead Pyrazolopyrimidine Antiviral HCV Inhibitors Arrowcompounds and salts Therapeutics From WO- Ltd. 2005047288 26 May 2005Levovirin Antiviral IMPDH inhibitor Ribapharm Inc., Costa Mesa, CAMerimepodib Antiviral IMPDH inhibitor Vertex (VX-497) PharmaceuticalsInc., Cambridge, MA XTL-6865 (XTL-002) Antiviral monoclonal XTL antibodyBiopharmaceuticals Ltd., Rehovot, Isreal Telaprevir Antiviral NS3 serineprotease Vertex (VX-950, LY-570310) inhibitor Pharmaceuticals Inc.,Cambridge, MA/Eli Lilly and Co. Inc., Indianapolis, IN HCV-796 AntiviralNS5B Replicase Wyeth/ Inhibitor Viropharma NM-283 Antiviral NS5BReplicase Idenix/ Inhibitor Novartis GL-59728 Antiviral NS5B ReplicaseGene Labs/ Inhibitor Novartis GL-60667 Antiviral NS5B Replicase GeneLabs/ Inhibitor Novartis 2′C MeA Antiviral NS5B Replicase GileadInhibitor PSI 6130 Antiviral NS5B Replicase Roche Inhibitor R1626Antiviral NS5B Replicase Roche Inhibitor 2′C Methyl adenosine AntiviralNS5B Replicase Merck Inhibitor JTK-003 Antiviral RdRp inhibitor JapanTobacco Inc., Tokyo, Japan Levovirin Antiviral ribavirin ICNPharmaceuticals, Costa Mesa, CA Ribavirin Antiviral ribavirin Schering-Plough Corporation, Kenilworth, NJ Viramidine Antiviral RibavirinProdrug Ribapharm Inc., Costa Mesa, CA Heptazyme Antiviral ribozymeRibozyme Pharmaceuticals Inc., Boulder, CO BILN-2061 Antiviral serineprotease Boehringer inhibitor Ingelheim Pharma KG, Ingelheim, GermanySCH 503034 Antiviral serine protease Schering inhibitor Plough ZadazimImmune Immune modulator SciClone modulator Pharmaceuticals Inc., SanMateo, CA Ceplene Immunomodulator immune modulator Maxim PharmaceuticalsInc., San Diego, CA CellCept Immunosuppressant HCV IgG F. Hoffmann-immunosuppressant La Roche LTD, Basel, Switzerland CivacirImmunosuppressant HCV IgG Nabi immunosuppressant BiopharmaceuticalsInc., Boca Raton, FL Albuferon-α Interferon albumin IFN-α2b Human GenomeSciences Inc., Rockville, MD Infergen A Interferon IFN alfacon-1InterMune Pharmaceuticals Inc., Brisbane, CA Omega IFN Interferon IFN-ωIntarcia Therapeutics IFN-β and EMZ701 Interferon IFN-β and EMZ701Transition Therapeutics Inc., Ontario, Canada Rebif Interferon IFN-β1aSerono, Geneva, Switzerland Roferon A Interferon IFN-α2a F. Hoffmann- LaRoche LTD, Basel, Switzerland Intron A Interferon IFN-α2b Schering-Plough Corporation, Kenilworth, NJ Intron A and Zadaxin InterferonIFN-α2b/α1- RegeneRx thymosin Biopharmiceuticals Inc., Bethesda, MD/SciClone Pharmaceuticals Inc, San Mateo, CA Rebetron InterferonIFN-α2b/ribavirin Schering- Plough Corporation, Kenilworth, NJ ActimmuneInterferon INF-γ InterMune Inc., Brisbane, CA Interferon-β InterferonInterferon-β-1a Serono Multiferon Interferon Long lasting IFNViragen/Valentis Wellferon Interferon lymphoblastoid GlaxoSmithKlineIFN-αn1 plc, Uxbridge, UK Omniferon Interferon natural IFN-α ViragenInc., Plantation, FL Pegasys Interferon PEGylated IFN-α2a F. Hoffmann-La Roche LTD, Basel, Switzerland Pegasys and Ceplene InterferonPEGylated IFN- Maxim α2a/ Pharmaceuticals immune modulator Inc., SanDiego, CA Pegasys and Ribavirin Interferon PEGylated IFN- F. Hoffmann-α2a/ribavirin La Roche LTD, Basel, Switzerland PEG-Intron InterferonPEGylated IFN-α2b Schering- Plough Corporation, Kenilworth, NJPEG-Intron/ Interferon PEGylated IFN- Schering- Ribavirin α2b/ribavirinPlough Corporation, Kenilworth, NJ IP-501 Liver protection antifibroticIndevus Pharmaceuticals Inc., Lexington, MA IDN-6556 Liver protectioncaspase inhibitor Idun Pharmaceuticals Inc., San Diego, CA ITMN-191(R-7227) Antiviral serine protease InterMune inhibitor PharmaceuticalsInc., Brisbane, CA GL-59728 Antiviral NS5B Replicase Genelabs InhibitorANA-971 Antiviral TLR-7 agonist Anadys

The compounds of the present disclosure may also be used as laboratoryreagents. Compounds may be instrumental in providing research tools fordesigning of viral replication assays, validation of animal assaysystems and structural biology studies to further enhance knowledge ofthe HCV disease mechanisms. Further, the compounds of the presentdisclosure are useful in establishing or determining the binding site ofother antiviral compounds, for example, by competitive inhibition.

The compounds of this disclosure may also be used to treat or preventviral contamination of materials and therefore reduce the risk of viralinfection of laboratory or medical personnel or patients who come incontact with such materials, e.g., blood, tissue, surgical instrumentsand garments, laboratory instruments and garments, and blood collectionor transfusion apparatuses and materials.

This disclosure is intended to encompass compounds having formula (I)when prepared by synthetic processes or by metabolic processes includingthose occurring in the human or animal body (in vivo) or processesoccurring in vitro.

The abbreviations used in the present application, includingparticularly in the illustrative schemes and examples which follow, arewell-known to those skilled in the art. Some of the abbreviations usedare as follows: HATU forO-(7-azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyluroniumhexafluorophosphate; Boc or BOC for tert-butoxycarbonyl; NBS forN-bromosuccinimide; tBu or t-Bu for tert-butyl; SEM for-(trimethylsilyl)ethoxymethyl; DMSO for dimethylsulfoxide; MeOH formethanol; TFA for trifluoroacetic acid; RT for room temperature orretention time (context will dictate); t_(R) for retention time; EDCIfor 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride; DMAPfor 4-dimethylaminopyridine; THF for tetrahydrofuran; DBU for1,8-diazabicyclo[5.4.0]undec-7-ene; t-Bu; DEA for diethylamine; HMDS forhexamethyldisilazide; DMF for N,N-dimethylformamide; Bzl for benzyl;EtOH for ethanol; iPrOH or i-PrOH for isopropanol; Me₂S fordimethylsulfide; Et₃N or TEA for triethylamine; Ph for phenyl; OAc foracetate; EtOAc for ethyl acetate; dppf for1,1′-bis(diphenylphosphino)ferrocene; iPr₂EtN or DIPEA fordiisopropylethylamine; Cbz for carbobenzyloxy; n-BuLi forn-butyllithium; ACN for acetonitrile; h or hr for hours; m or min forminutes; s for seconds; LiHMDS for lithium hexamethyldisilazide; DIBALfor diisobutyl aluminum hydride; TBDMSCl for tert-butyldimethylsilylchloride; Me for methyl; ca. for about; OAc for acetate; iPr forisopropyl; Et for ethyl; Bn for benzyl; and HOAT for1-hydroxy-7-azabenzotriazole.

The compounds and processes of the present disclosure will be betterunderstood in connection with the following synthetic schemes whichillustrate the methods by which the compounds of the present disclosuremay be prepared. Starting materials can be obtained from commercialsources or prepared by well-established literature methods known tothose of ordinary skill in the art. It will be readily apparent to oneof ordinary skill in the art that the compounds defined above can besynthesized by substitution of the appropriate reactants and agents inthe syntheses shown below. It will also be readily apparent to oneskilled in the art that the selective protection and deprotection steps,as well as the order of the steps themselves, can be carried out invarying order, depending on the nature of the variables to successfullycomplete the syntheses below. The variables are as defined above unlessotherwise noted below.

Scheme 1: Symmetric or Asymmetric Biphenyls

Aryl halide 1 and boronic ester 2 can be coupled to produce biaryl 3using standard Suzuki-Miayura coupling conditions (Angew Chem. Int. Ed.Engl 2001, 40, 4544). It should be noted that the boronic acid analog of2 may be used in place of the ester. Mono-deprotection of thepyrrolidine moiety may be accomplished when R¹² and R¹³ are different.When R=benzyl, and R¹³=t-butyl treatment to hydrogenolytic conditionsproduces 4. For example, Pd/C catalyst in the presence of a base such aspotassium carbonate can be used. Acylation of 4 can be accomplishedunder standard acylation conditions. A coupling reagent such as HATU incombination with an amine base such as Hunig's base can be used in thisregard. Alternatively, 4 may be reacted with an isocyanate or carbamoylchloride to provide compounds of formula 5 where R⁹ is an amine. Furtherdeprotection of 5 can be accomplished by treatment with strong acid suchas HCl or trifluoroacetic acid. Standard conditions analogous to thoseused to convert 4 to 5 can be used to prepare 7 from 6. In anotherembodiment where R¹²═R¹³=t-Bu, direct conversion to 8 can beaccomplished by treatment of 3 with strong acid such as HCl ortrifluoroacetic acid. Conversion of 8 to 7 is accomplished in analogousfashion to the methods used to prepare 5 from 4 or 7 from 6. In thisinstance however, the caps in 7 will be identical.

Conversion of 6 (from Scheme 1) to 10 can be done using standard amidecoupling conditions such as HATU with an amine base, such as Hunig'sbase. Deprotection can be accomplished with strong acid such as HCl ortrifluoroacetic acid affording 11. Compound 11 can then be converted to12, 13, or 14 using an acid chloride, an isocyanate or carbamoylchloride, or a chloroformate respectively.

Compound 15 (15=7 (Scheme 1) wherein each R⁹ is —CH(NHBoc)R¹⁸)can beconverted to 16 via treatment with strong acid such as HCl ortrifluoroacetic acid. Compounds 17, 18, and 19 can be prepared from 16by treating 16 with an appropriate chloroformate, isocyanate orcarbamoyl chloride, or an acid chloride respectively.

Symmetrical biphenyl analogs (compounds of formula 7 where both halvesof the molecule are equivalent) can be synthesized starting frombromoketone 20. Amination by displacement with a nucleophile such asazide, phthalimide or preferably sodium diformylamide (Yinglin andHongwen, Synthesis 1990, 122) followed by deprotection affords 21.Condensation under standard amination conditions such as HATU andHunig's base with an appropriately protected amino acid provides 22.Heating with ammonium acetate under thermal or microwave conditionsresults in the formation of 3 which can be deprotected with strong acidsuch as HCl or trifluoroacetic acid (R¹²═R¹³=t-Bu) or by hydrogenolysiswith hydrogen gas and a transition metal catalyst such as Pd/C(R¹²αR¹³=benzyl). Acylation can be affected with a carboxylic acid(R⁹CO₂H) in a manner similar to the conversion of 21 to 22. Ureaformation can be accomplished by treatment with an appropriateisocycante (R⁹═R²⁴R²⁵N; R²⁵═H) or carbamoyl chloride (R⁹═R²⁴R²⁵N; R²⁵ isother than hydrogen).

Scheme 5 describes the preparation of some of the starting materialsrequired for the synthetic sequences depicted in Schemes 1-4. Keyintermediate 25 (analogous to 1 in Scheme 1) is prepared from keto-amide24 or keto-ester 27 via heating with ammonium acetate under thermal ormicrowave conditions. Keto-amide 24 can be prepared from 23 viacondensation with an appropriate cyclic or acyclic amino acid understandard amide formation conditions. Bromide 26 can give rise to 23 bytreatment with a nucleophile such as azide, phthalimide or sodiumdiformylamide (Synthesis 1990, 122) followed by deprotection. Bromide 26can also be converted to 27 by reacting with an appropriate cyclic oracyclic N-protected amino acid in the presence of base such as potassiumcarbonate or sodium bicarbonate. Bromination of 28 with a source ofbromonium ion such as bromine, NBS, or CBr₄ results in the formation of26. Bromide 25 can be converted to boronic ester 2 via treatment withbis-pinacalotodiboron under palladium catalysis according to the methoddescribed in Journal of Organic Chemistry 1995, 60, 7508, or variationsthereof.

In another embodiment, starting materials such as 31a (analogous to 25in Scheme 5 and 1 in Scheme 1) may be prepared by reactingbromoimidazole derivatives 31 under Suzuki-type coupling conditions witha variety of chloro-substituted aryl boronic acids which can either beprepared by standard methodologies (see, for example, Organic Letters2006, 8, 305 and references cited therein) or purchased from commercialsuppliers. Bromoimidazole 31 can be obtained by brominating imidazole 30with a source of bromonium ion such as bromine, CBr₄, orN-bromosuccinimide. Imidazole 30 can be prepared from N-protected aminoacids which are appropriately substituted by reacting with glyoxal in amethanolic solution of ammonium hydroxide.

In yet another embodiment of the current disclosure, aryl halide 32 canbe coupled under Suzuki-Miyaura palladium catalyzed conditions to formthe heteroaryl derivative 34. Compound 34 can be elaborated to 35 bytreatment to hydrogenolytic conditions with hydrogen and a transitionmetal catalyst such as palladium on carbon (R¹³=benzyl). Acylation of 35can be accomplished with an appropriate acid chloride (R⁹COCl) in thepresence of a base such as triethylamine, with an appropriatelysubstituted carboxylic acid (R⁹CO₂H) in the presence of a standardcoupling reagent such as HATU, or with an isoscyanate (R²⁷NCO whereinR⁹═R²⁷R²⁸N—; R²⁸═H)or carbamoyl chloride (R²⁷R²⁸NCOCl whereinR⁹═R²⁷R²⁸N—). Compound 37 can be prepared from 36 (R¹²=t-Bu) viatreatment with strong acid such as HCl or trifluoroacetic acid.Acylation of the resulting amine in 37 to give 38 can be accomplished asin the transformation of 35 to 36. In cases where R¹²═R¹³, 34 can bedirectly transformed into 39 by treatment with strong acid such as HClor trifluoroacetic acid (R¹²═R¹³=t-Bu) or by employing hydrogenolyticconditions with hydrogen and a transition metal catalyst such aspalladium on carbon (R¹²═R¹³=benzyl). Acylation of 39 can beaccomplished in analogous fashion to that described for thetransformation of 35 to 36.

Heteroaryl chloride 29 can be converted to symmetrical analog 40 viatreatment with a source of palladium such as dichlorobis(benzonitrile)palladium in the presence of tetrakis(dimethylamino)ethylene at elevatedtemperature. Removal of the SEM ether and Boc carbamates found in 40 canbe accomplished in one step by treatment with a strong acid such as HClor trifluoroacetic acid providing 41. Conversion to 42 can beaccomplished in similar fashion to the conditions used to convert 38 to39 in Scheme 7.

Compound 43 (analogous to 42 wherein R₂₃═—CH(NHBoc)R₂₄) may beelaborated to 45, 46, and 47 via similar methodologies to thosedescribed in Scheme 3. In cases where R₂₀=alkoxymethyl (ie; SEM),removal can be accomplished simultaneously with removal of the Boccarbamate (cf; 43 to 44) using strong acid such as HCl ortrifluoroacetic acid.

Heteroaryl bromides 54 may be reacted with a vinyl stannane such astributyl(1-ethoxyvinyl)tin in the presence of a source of palladium suchas dichlorobis(triphenylphosphine)palladium (II) to provide 55 which canbe subsequently transformed into bromoketone 51 via treatment with asource of bromonium ion such as N-bormosuccinimide, CBr₄, or bromine.Alternatively, keto-substituted heteroaryl bromides 53 may be directlyconverted to 51 via treatment with a source of bromonium ion such asbromine, CBr₄, or N-bromosuccinimide. Bromide 51 can be converted toaminoketone 48 via addition of sodium azide, potassium phthalimide orsodium diformylamide (Synthesis 1990 122) followed by deprotection.Aminoketone 48 can then be coupled with an appropriately substitutedamino acid under standard amide formation conditions (i.e.; a couplingreagent such as HATU in the presence of a mild base such as Hunig'sbase) to provide 49. Compound 49 can then be further transformed intoimidazole 50 via reacting with ammonium acetate under thermal ormicrowave conditions. Alternatively, 51 can be directly reacted with anappropriately substituted amino acid in the presence of a base such assodium bicarbonate or potassium carbonate providing 52 which can in turnbe reacted with ammonium acetate under thermal or microwave conditionsto provide 50. Imidazole 50 can be protected with an alkoxylmethyl groupby treatment with the appropriate alkoxymethyl halide such as2-(trimethylsilyl)ethoxymethyl chloride after first being deprotonatedwith a strong base such as sodium hydride.

Substituted phenylglycine derivatives can be prepared by a number ofmethods shown below. Phenylglycine t-butyl ester can be reductivelyalkylated (pathyway A) with an appropriate aldehyde and a reductant suchas sodium cyanoborohydride in acidic medium. Hydrolysis of the t-butylester can be accomplished with strong acid such as HCl ortrifluoroacetic acid. Alternatively, phenylglycine can be alkylated withan alkyl halide such as ethyl iodide and a base such as sodiumbicarbonate or potassium carbonate (pathway B). Pathway C illustratesreductive alkylation of phenylglycine as in pathway A followed by asecond reductive alkylation with an alternate aldehyde such asformaldehyde in the presence of a reducing agent and acid. Pathway Dillustrates the synthesis of substituted phenylglycines via thecorresponding mandelic acid analogs. Conversion of the secondary alcoholto a competent leaving group can be accomplished with p-toluensulfonylchloride. Displacement of the tosylate group with an appropriate aminefollowed by reductive removal of the benzyl ester can providesubstituted phenylglycine derivatives. In pathway E a racemicsubstituted phenylglycine derivative is resolved by esterification withan enantiomerically pure chiral auxiliary such as but not limited to(+)-1-phenylethanol, (−)-1-phenylethanol, an Evan's oxazolidinone, orenantiomerically pure pantolactone. Separation of the diastereomers isaccomplished via chromatography (silica gel, HPLC, crystallization, etc)followed by removal of the chiral auxiliary providing enantiomericallypure phenylglycine derivatives. Pathway H illustrates a syntheticsequence which intersects with pathway E wherein the aforementionedchiral auxiliary is installed prior to amine addition. Alternatively, anester of an arylacetic acid can be brominated with a source of bromoniumion such as bromine, N-bromosuccinimide, or CBr₄. The resultant benzylicbromide can be displaced with a variety of mono- or disubstituted aminesin the presence of a tertiary amine base such as triethylamine orHunig's base. Hydrolysis of the methyl ester via treatment with lithiumhydroxide at low temperature or 6N HCl at elevated temperature providesthe substituted phenylglycine derivatives. Another method is shown inpathway G. Glycine analogs can be derivatized with a variety of arylhalides in the presence of a source of palladium (0) such as palladiumbis(tributylphosphine) and base such as potassium phosphate. Theresultant ester can then be hydrolyzed by treatment with base or acid.It should be understood that other well known methods to preparephenylglycine derivatives exist in the art and can be amended to providethe desired compounds in this description. It should also be understoodthat the final phenylglycine derivatives can be purified to enantiomericpurity greater than 98%ee via preparative HPLC.

In another embodiment of the present disclosure, acylated phenylglycinederivatives may be prepared as illustrated below. Phenylglycinederivatives wherein the carboxylic acid is protected as an easilyremoved ester, may be acylated with an acid chloride in the presence ofa base such as triethylamine to provide the corresponding amides(pathway A). Pathway B illustrates the acylation of the startingphenylglycine derivative with an appropriate chloroformate while pathwayC shows reaction with an appropriate isocyanate or carbamoyl chloride.Each of the three intermediates shown in pathways A-C may be deprotectedby methods known by those skilled in the art (ie; treatment of thet-butyl ester with strong base such as HCl or trifluoroacetic acid).

Amino-substituted phenylacetic acids may be prepared by treatment of achloromethylphenylacetic acid with an excess of an amine.

Compound Analysis Conditions

Purity assessment and low resolution mass analysis were conducted on aShimadzu LC system coupled with Waters Micromass ZQ MS system. It shouldbe noted that retention times may vary slightly between machines. The LCconditions employed in determining the retention time (RT) were:

Condition 1

-   Column =Phenomenex-Luna 3.0×50 mm S10-   Start % B=0-   Final % B=100-   Gradient time=2 min-   Stop time=3 min-   Flow Rate=4 mL/min-   Wavelength=220 nm-   Slovent A=0.1% TFA in 10% methanol/90% H₂O-   Solvent B=0.1% TFA in 90% methanol/10% H₂O

Condition 2

-   Column=Phenomenex-Luna 4.6×50 mm S10-   Start % B=0-   Final % B=100-   Gradient time=2 min-   Stop time=3 min-   Flow Rate=5 mL/min-   Wavelength=220 nm-   Slovent A=0.1% TFA in 10% methanol/90% H₂O-   Solvent B=0.1% TFA in 90% methanol/10% H₂O

Condition 3

-   Column=HPLC XTERRA C18 3.0×50 mm S7-   Start % B=0-   Final % B=100-   Gradient time=3 min-   Stop time=4 min-   Flow Rate=4 mL/min-   Wavelength=220 nm-   Slovent A=0.1% TFA in 10% methanol/90% H₂O-   Solvent B=0.1% TFA in 90% methanol/10% H₂O

Condition M1

-   Column: Luna 4.6×50 mm S10-   Start % B=0-   Final % B=100-   Gradient time=3 min-   Stop time=4 min-   Flow rate=4 mL/min-   Solvent A:=95% H₂0: 5% CH₃CN, 10 mm Ammonium acetate-   Solvent B:=5% H₂O: 95% CH₃CN; 10 mm Ammonium acetate

Synthesis of Common Caps

A suspension of 10% Pd/C (2.0 g)in methanol (10 mL) was added to amixture of (R)-2-phenylglycine (10 g, 66.2 mmol), formaldehyde (33 mL of37% wt. in water), 1N HCl (30 mL) and methanol (30 mL), and exposed toH₂ (60 psi) for 3 hours. The reaction mixture was filtered throughdiatomaceous earth (Celite®), and the filtrate was concentrated invacuo. The resulting crude material was recrystallized from isopropanolto provide the HCl salt of Cap-1 as a white needle (4.0 g). Opticalrotation: −117.1° [c=9.95 mg/mL in H₂O; λ=589 nm]. ¹H NMR (DMSO-d₆,γ=2.5 ppm, 500 MHz): δ 7.43-7.34 (m, 5H), 4.14 (s, 1H), 2.43 (s, 6H); LC(Cond. 1): RT=0.25; LC/MS: Anal. Calcd. for [M+H]⁻ C₁₀H₁₄NO₂ 180.10;found 180.17; HRMS: Anal. Calcd. for [M+H]⁻ C₁₀H₁₄NO₂ 180.1025; found180.1017.

NaBH₃CN (6.22 g, 94 mmol) was added in portions over a few minutes to acooled (ice/water) mixture of (R)-2-Phenylglycine (6.02 g, 39.8 mmol)and MeOH (100 mL), and stirred for 5 min. Acetaldehyde (10 mL) was addeddrop-wise over 10 min and stirring was continued at the same cooledtemperature for 45 min and at ambient temperature for ˜6.5 hr. Thereaction mixture was cooled back with ice-water bath, treated with water(3 mL) and then quenched with a drop-wise addition of concentrated HClover ˜45 min until the pH of the mixture is ˜1.5-2.0. The cooling bathwas removed and the stirring was continued while adding concentrated HClin order to maintain the pH of the mixture around 1.5-2.0. The reactionmixture was stirred over night, filtered to remove the white suspension,and the filtrate was concentrated in vacuo. The crude material wasrecrystallized from ethanol to afford the HCl salt of Cap-2 as a shiningwhite solid in two crops (crop-1: 4.16 g; crop-2: 2.19 g). ¹H NMR(DMSO-d₆, δ=2.5 ppm, 400 MHz): 10.44 (1.00, br s, 1H), 7.66 (m, 2H),7.51 (m, 3H), 5.30 (s, 1H), 3.15 (br m, 2H), 2.98 (br m, 2H), 1.20 (appbr s, 6H). Crop-1: [α]²⁵−102.21° (c=0.357, H₂O); crop-2: [α]²⁵−99.7°(c=0.357, H₂O).

LC (Cond. 1): RT=0.43 min; LC/MS: Anal. Calcd. for [M+H]⁺ C₁₂H₁₈NO₂:208.13; found 208.26

Acetaldehyde (5.0 mL, 89.1 mmol) and a suspension of 10% Pd/C (720 mg)in methanol/H₂O (4mL/1 mL) was sequentially added to a cooled (˜15° C.)mixture of (R)-2-phenylglycine (3.096 g, 20.48 mmol), 1N HCl (30 mL) andmethanol (40 mL). The cooling bath was removed and the reaction mixturewas stirred under a balloon of H₂ for 17 hours. An additionalacetaldehyde (10 mL, 178.2 mmol) was added and stirring continued underH₂ atmosphere for 24 hours [Note: the supply of H₂ was replenished asneeded throughout the reaction]. The reaction mixture was filteredthrough diatomaceous earth (Celite®), and the filtrate was concentratedin vacuo. The resulting crude material was recrystallized fromisopropanol to provide the HCl salt of (R)-2-(ethylamino)-2-phenylaceticacid as a shining white solid (2.846 g). ¹H NMR (DMSO-d₆, δ=2.5 ppm, 400MHz): δ 14.15 (br s, 1H), 9.55 (br s, 2H), 7.55-7.48 (m, 5H), 2.88 (brm, 1H), 2.73 (br m, 1H), 1.20 (app t, J=7.2, 3H). LC (Cond. 1): RT=0.39min; >95% homogeneity index; LC/MS: Anal. Calcd. for [M+H]⁺ C₁₀H₁₄NO₂:180.10; found 180.18.

A suspension of 10% Pd/C (536 mg) in methanol/H₂O (3 mL/1 mL) was addedto a mixture of (R)-2-(ethylamino)-2-phenylacetic acid/HCl (1.492 g,6.918 mmol), formaldehyde (20 mL of 37% wt. in water), 1N HCl (20 mL)and methanol (23 mL). The reaction mixture was stirred under a balloonof H₂ for ˜72 hours, where the H₂ supply was replenished as needed. Thereaction mixture was filtered through diatomaceous earth (Celite®) andthe filtrate was concentrated in vacuo. The resulting crude material wasrecrystallized from isopropanol (50 mL) to provide the HCl salt of Cap-3as a white solid (985 mg). ¹H NMR (DMSO-d₆, 6 =2.5 ppm, 400 MHz): δ10.48 (br s, 1H), 7.59-7.51 (m, 5H), 5.26 (s, 1H), 3.08 (app br s, 2H),2.65 (br s, 3H), 1.24 (br m, 3H). LC (Cond. 1): RT=0.39 min; >95%homogeneity index; LC/MS: Anal. Calcd. for [M+H]⁺ C₁₁H₁₆NO₂: 194.12;found 194.18; HRMS: Anal. Calcd. for [M+H]⁺ C₁₁H₁₆NO₂: 194.1180; found194.1181.

ClCO₂Me (3.2 mL, 41.4 mmol) was added dropwise to a cooled (ice/water)THF (410 mL) semi-solution of (R)-tert-butyl 2-amino-2-phenylacetate/HCl(9.877 g, 40.52 mmol) and diisopropylethylamine (14.2 mL, 81.52 mmol)over 6 min, and stirred at similar temperature for 5.5 hours. Thevolatile component was removed in vacuo, and the residue was partitionedbetween water (100 mL) and ethyl acetate (200 mL). The organic layer waswashed with 1N HCl (25 mL) and saturated NaHCO₃ solution (30 mL), dried(MgSO₄), filtered, and concentrated in vacuo. The resultant colorlessoil was triturated from hexanes, filtered and washed with hexanes (100mL) to provide (R)-tert-butyl 2-(methoxycarbonylamino)-2-phenylacetateas a white solid (7.7 g). ¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz): 7.98 (d,J=8.0, 1H), 7.37-7.29 (m, 5H), 5.09 (d, J=8, 1H), 3.56 (s, 3H), 1.33 (s,9H). LC (Cond. 1): RT=1.53 min; ˜90% homogeneity index; LC/MS: Anal.Calcd. for [M+Na]⁺ C₁₄H₁₉NNaO₄: 288.12; found 288.15.

TFA (16 mL) was added dropwise to a cooled (ice/water) CH₂Cl₂ (160 mL)solution of the above product over 7 minutes, and the cooling bath wasremoved and the reaction mixture was stirred for 20 hours. Since thedeprotection was still not complete, an additional TFA (1.0 mL) wasadded and stirring continued for an additional 2 hours. The volatilecomponent was removed in vacuo, and the resulting oil residue wastreated with diethyl ether (15 mL) and hexanes (12 mL) to provide aprecipitate. The precipitate was filtered and washed with diethylether/hexanes (˜1:3 ratio; 30 mL) and dried in vacuo to provide Cap-4 asa fluffy white solid (5.57 g). Optical rotation: −176.9° [c=3.7 mg/mL inH₂O; λ=589 nm]. ¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz): δ 12.84 (br s,1H), 7.96 (d, J=8.3, 1H), 7.41-7.29 (m, 5H), 5.14 (d, J=8.3, 1H), 3.55(s, 3H). LC (Cond. 1): RT=1.01 min; >95% homogeneity index; LC/MS: Anal.Calcd. for [M+H]⁺ C₁₀H₁₂NO₄ 210.08; found 210.17; HRMS: Anal. Calcd. for[M+H]⁺ C₁₀H₁₂NO₄ 210.0766; found 210.0756.

A mixture of (R)-2-phenylglycine (1.0 g, 6.62 mmol), 1,4-dibromobutane(1.57 g, 7.27 mmol) and Na₂CO₃ (2.10 g, 19.8 mmol) in ethanol (40 mL)was heated at 100° C. for 21 hours. The reaction mixture was cooled toambient temperature and filtered, and the filtrate was concentrated invacuo. The residue was dissolved in ethanol and acidified with 1N HCl topH 3-4, and the volatile component was removed in vacuo. The resultingcrude material was purified by a reverse phase HPLC (water/methanol/TFA)to provide the TFA salt of Cap-5 as a semi-viscous white foam (1.0 g).¹H NMR (DMSO-d₆, δ=2.5, 500 MHz) δ10.68 (br s, 1H), 7.51 (m, 5H), 5.23(s, 1H), 3.34 (app br s, 2H), 3.05 (app br s, 2H), 1.95 (app br s, 4H);RT=0.30 min (Cond. 1); >98% homogeneity index; LC/MS: Anal. Calcd. for[M+H]⁺ C₁₂H₁₆NO₂: 206.12; found 206.25.

The TFA salt of Cap-6 was synthesized from (R)-2-phenylglycine and1-bromo-2-(2-bromoethoxy)ethane by using the method of preparation ofCap-5. ¹H NMR (DMSO-d₆, δ=2.5, 500 MHz) δ 12.20 (br s, 1H), 7.50 (m,5H), 4.92 (s, 1H), 3.78 (app br s, 4H), 3.08 (app br s, 2H), 2.81 (appbr s, 2H); RT=0.32 min (Cond. 1); >98%; LC/MS: Anal. Calcd. for [M+H]⁺C₁₂H₁₆NO₃: 222.1 1; found 222.20; HRMS: Anal. Calcd. for[M+H]⁺C₁₂H₁₆NO₃: 222.1130; found 222.1121.

A CH₂Cl₂ (200 mL) solution of p-toluenesulfonyl chloride (8.65 g, 45.4mmol) was added dropwise to a cooled (−5° C.) CH₂Cl₂ (200 mL) solutionof (S)-benzyl 2-hydroxy-2-phenylacetate (10.0 g, 41.3 mmol),triethylamine (5.75 mL, 41.3 mmol) and 4-dimethylaminopyridine (0.504 g,4.13 mmol), while maintaining the temperature between −5° C. and 0° C.The reaction was stirred at 0° C. for 9 hours, and then stored in afreezer (−25° C.) for 14 hours. It was allowed to thaw to ambienttemperature and washed with water (200 mL), 1N HCl (100 mL) and brine(100 mL), dried (MgSO₄), filtered, and concentrated in vacuo to providebenzyl 2-phenyl-2-(tosyloxy)acetate as a viscous oil which solidifiedupon standing (16.5 g). The chiral integrity of the product was notchecked and that product was used for the next step without furtherpurification. ¹H NMR (DMSO-d₆, δ=2.5, 500 MHz) δ 7.78 (d, J=8.6, 2H),7.43-7.29 (m, 10H), 7.20 (m, 2H), 6.12 (s, 1H), 5.16 (d, J=12.5, 1H),5.10 (d, J=12.5, 1H), 2.39 (s, 3H). RT=3.00 (Cond. 3); >90% homogeneityindex; LC/MS: Anal. Calcd. for [M+H]⁺ C₂₂H₂₀NaO₅S: 419.09; found 419.04.

A THF (75 mL) solution of benzyl 2-phenyl-2-(tosyloxy)acetate (6.0 g,15.1 mmol), 1-methylpiperazine (3.36 mL, 30.3 mmol) andN,N-diisopropylethylamine (13.2 mL, 75.8 mmol) was heated at 65° C. for7 hours. The reaction was allowed to cool to ambient temperature and thevolatile component was removed in vacuo. The residue was partitionedbetween ethylacetate and water, and the organic layer was washed withwater and brine, dried (MgSO₄), filtered, and concentrated in vacuo. Theresulting crude material was purified by flash chromatography (silicagel, ethyl acetate) to provide benzyl2-(4-methylpiperazin-1-yl)-2-phenylacetate as an orangish-brown viscousoil (4.56 g). Chiral HPLC analysis (Chiralcel OD-H) indicated that thesample is a mixture of enantiomers in a 38.2 to 58.7 ratio. Theseparation of the enantiomers were effected as follow: the product wasdissolved in 120 mL of ethanol/heptane (1:1) and injected (5mL/injection) on chiral HPLC column (Chiracel OJ, 5 cm ID×50 cm L, 20μm) eluting with 85:15 Heptane/ethanol at 75 mL/min, and monitored at220 nm. Enantiomer-1 (1.474 g ) and enantiomer-2 (2.2149 g)wereretrieved as viscous oil. ¹H NMR (CDCl₃, δ=7.26, 500 MHz) 7.44-7.40 (m,2H), 7.33-7.24 (m, 6H), 7.21-7.16 (m, 2H), 5.13 (d, J=12.5, 1H), 5.08(d, J=12.5, 1H), 4.02 (s, 1H), 2.65-2.38 (app br s, 8H), 2.25 (s, 3H).RT=2.10 (Cond. 3); >98% homogeneity index; LC/MS: Anal. Calcd. for[M+H]⁺ C₂₀H₂₅N₂O₂: 325.19; found 325.20.

A methanol (10 mL) solution of either enantiomer of benzyl2-(4-methylpiperazin-1-yl)-2-phenylacetate (1.0 g, 3.1 mmol) was addedto a suspension of 10% Pd/C (120 mg) in methanol (5.0 mL). The reactionmixture was exposed to a balloon of hydrogen, under a carefulmonitoring, for <50 min. Immediately after the completion of thereaction, the catalyst was filtered through diatomaceous earth (Celite®)and the filtrate was concentrated in vacuo to provide Cap-7,contaminated with phenylacetic acid as a tan foam (867.6 mg; mass isabove the theoretical yield). The product was used for the next stepwithout further purification. ¹H NMR (DMSO-d₆, δ=2.5, 500 MHz) δ7.44-7.37 (m, 2H), 7.37-7.24 (m, 3H), 3.92 (s, 1H), 2.63-2.48 (app. bs,2H), 2.48-2.32 (m, 6H), 2.19 (s, 3H); RT=0.31 (Cond. 2); >90%homogeneity index; LC/MS: Anal. Calcd. for [M+H]⁺ C₁₃H₁₉N₂O₂: 235.14;found 235.15; HRMS: Anal. Calcd. for [M+H]⁺ C₁₃H₁₉N₂O₂: 235.1447; found235.1440.

The synthesis of Cap-8 and Cap-9 was conducted according to thesynthesis of Cap-7 by using appropriate amines for the SN₂ displacementstep (i.e., 4-hydroxypiperidine for Cap-8 and (S)-3-fluoropyrrolidinefor Cap-9) and modified conditions for the separation of the respectivestereoisomeric intermedites, as described below.

The enantiomeric separation of the intermediate benzyl2-(4-hydroxypiperidin-1-yl)-2-phenyl acetate was effected by employingthe following conditions: the compound (500 mg) was dissolved inethanol/heptane (5 mL/45 mL). The resulting solution was injected (5mL/injection) on a chiral HPLC column (Chiracel OJ, 2 cm ID×25 cm L, 10μm) eluting with 80:20 heptane/ethanol at 10 mL/min, monitored at 220nm, to provide 186.3 mg of enantiomer-1 and 209.1 mg of enantiomer-2 aslight-yellow viscous oils. These benzyl ester was hydrogenolysedaccording to the preparation of Cap-7 to provide Cap-8: ¹H NMR (DMSO-d₆,δ=2.5, 500 MHz) 7.40 (d, J=7, 2H), 7.28-7.20 (m, 3H), 3.78 (s 1H), 3.46(m, 1H), (m, 1H), 2.62 (m, 1H), 2.20 (m, 2H), 1.70 (m, 2H), 1.42 (m,2H). RT=0.28 (Cond. 2); >98% homogeneity index; LC/MS: Anal. Calcd. for[M+H]⁺ C₁₃H₁₈NO₃: 236.13; found 236.07; HRMS: Calcd. for [M+H]⁺C₁₃H₁₈NO₃: 236.1287; found 236.1283.

The diastereomeric separation of the intermediate benzyl2-((S)-3-fluoropyrrolidin-1-yl)-2-phenylacetate was effected byemploying the following conditions: the ester (220 mg) was separated ona chiral HPLC column (Chiracel OJ-H, 0.46 cm ID×25 cm L, 5 μm) elutingwith 95% CO₂/5% methanol with 0.1% TFA, at 10 bar pressure, 70 mL/minflow rate, and a temperature of 35° C. The HPLC elute for the respectivestereiosmers was concentrated, and the residue was dissolved in CH₂Cl₂(20 mL) and washed with an aqueous medium (10 mL water +1 mL saturatedNaHCO₃ solution). The organic phase was dried (MgSO₄), filtered, andconcentrated in vacuo to provide 92.5 mg of fraction-1 and 59.6 mg offraction-2. These benzyl esters were hydrogenolysed according to thepreparation of Cap-7 to prepare Caps 9a and 9b. Cap-9a (diastereomer-1;the sample is a TFA salt as a result of purification on a reverse phaseHPLC using H₂O/methanol/TFA solvent): ¹H NMR (DMSO-d₆, δ=2.5, 400 MHz)7.55-7.48 (m, 5H), 5.38 (d of m, J=53.7, 1H), 5.09 (br s, 1H), 3.84-2.82(br m, 4H), 2.31-2.09 (m, 2H). RT=0.42 (Cond. 1); >95% homogeneityindex; LC/MS: Anal. Calcd. for [M+H]⁺ C₁₂H₁₅FNO₂: 224.11; found 224.14;Cap-9b (diastereomer-2): ¹H NMR (DMSO-d₆, δ=2.5, 400 MHz) 7.43-7.21 (m,5H), 5.19 (d of m, J=55.9, 1H), 3.97 (s, 1H), 2.95-2.43 (m, 4H),2.19-1.78 2H). RT=0.44 (Cond. 1); LC/MS: Anal. Calcd. for [M+H]⁺C₁₂H₁₅FNO₂: 224.11; found 224.14.

To a solution of D-proline (2.0 g, 17 mmol) and formaldehyde (2.0 mL of37% wt. in H₂O) in methanol (15 mL) was added a suspension of 10% Pd/C(500 mg) in methanol (5 mL). The mixture was stirred under a balloon ofhydrogen for 23 hours. The reaction mixture was filtered throughdiatomaceous earth (Celite®) and concentrated in vacuo to provide Cap-10as an off-white solid (2.15 g). ¹H NMR (DMSO-d₆, δ=2.5, 500 MHz) 3.42(m, 1H), 3.37 (dd, J=9.4, 6.1, 1H), 2.85-2.78 (m, 1H), 2.66 (s, 3H),2.21-2.13 (m, 1H), 1.93-1.84 (m, 2H), 1.75-1.66 (m, 1H). RT=0.28 (Cond.2); >98% homogeneity index; LC/MS: Anal. Calcd. for [M+H]⁺ C₆H₁₂NO₂:130.09; found 129.96.

A mixture of (2S,4R)-4-fluoropyrrolidine-2-carboxylic acid (0.50 g, 3.8mmol), formaldehyde (0.5 mL of 37% wt. in H₂O), 12 N HCl (0.25 mL) and10% Pd/C (50 mg) in methanol (20 mL) was stirred under a balloon ofhydrogen for 19 hours. The reaction mixture was filtered throughdiatomaceous earth (Celite®) and the filtrate was concentrated in vacuo.The residue was recrystallized from isopropanol to provide the HCl saltof Cap-11 as a white solid (337.7 mg). ¹H NMR (DMSO-d₆, δ=2.5, 500 MHz)5.39 (d m, J=53.7, 1H), 4.30 (m, 1H), 3.90 (ddd, J=31.5, 13.5, 4.5, 1H),3.33 (dd, J=25.6, 13.4, 1H), 2.85 (s, 3H), 2.60-2.51 (m, 1H), 2.39-2.26(m, 1H). RT=0.28 (Cond. 2); >98% homogeneity index; LC/MS: Anal. Calcd.for [M+H]⁺ C₆H₁₁FNO₂: 148.08; found 148.06.

L-Alanine (2.0 g, 22.5 mmol) was dissolved in 10% aqueous sodiumcarbonate solution (50 mL), and a THF (50 mL) solution of methylchloroformate (4.0 mL) was added to it. The reaction mixture was stirredunder ambient conditions for 4.5 hours and concentrated in vacuo. Theresulting white solid was dissolved in water and acidified with 1N HClto a pH ˜2-3. The resulting solutions was extracted with ethyl acetate(3×100 mL), and the combined organic phase was dried (Na₂SO₄), filtered,and concentrated in vacuo to provide a colorless oil (2.58 g). 500 mg ofthis material was purified by a reverse phase HPLC (H₂O/methanol/TFA) toprovide 150 mg of Cap-12 as a colorless oil. H NMR (DMSO-d₆, δ=2.5, 500MHz) 7.44 (d, J=7.3, 0.8H), 7.10 (br s, 0.2H), 3.97 (m, 1H), 3.53 (s,3H), 1.25 (d, J=7.3, 3H).

A mixture of L-alanine (2.5 g, 28 mmol), formaldehyde (8.4 g, 37 wt. %),1N HCl (30 mL) and 10% Pd/C (500 mg) in methanol (30 mL) was stirredunder a hydrogen atmosphere (50 psi) for 5 hours. The reaction mixturewas filtered through diatomaceous earth (Celite®) and the filtrate wasconcentrated in vacuo to provide the HCl salt of Cap-13 as an oil whichsolidified upon standing under vacuum (4.4 g; the mass is abovetheoretical yield). The product was used without further purification.¹H NMR (DMSO-d₆, δ=2.5, 500 MHz) δ 12.1 (br s, 1H), 4.06 (q, J=7.4, 1H),2.76 (s, 6H), 1.46 (d, J=7.3, 3H).

Step 1: A mixture of (R)-(−)-D-phenylglycine tert-butyl ester (3.00 g,12.3 mmol), NaBH₃CN (0.773 g, 12.3 mmol), KOH (0.690 g, 12.3 mmol) andacetic acid (0.352 mL, 6.15 mmol) were stirred in methanol at 0° C. Tothis mixture was added glutaric dialdehyde (2.23 mL, 12.3 mmol) dropwiseover 5 minutes. The reaction mixture was stirred as it was allowed towarm to ambient temperature and stirring was continued at the sametemperature for 16 hours. The solvent was subsequently removed and theresidue was partitioned with 10% aqueous NaOH and ethyl acetate. Theorganic phase was separated, dried (MgSO₄), filtered and concentrated todryness to provide a clear oil. This material was purified byreverse-phase preparative HPLC (Primesphere C-18, 30×100 mm;CH₃CN—H₂O-0.1% TFA) to give the intermediate ester (2.70 g, 56%) as aclear oil. ¹HNMR (400 MHz, CDCl₃) δ 7.53-7.44 (m, 3H), 7.40-7.37 (m,2H), 3.87 (d, J=10.9 Hz, 1H), 3.59 (d, J=10.9 Hz, 1H), 2.99 (t, J=11.2Hz, 1H), 2.59 (t, J=11.4 Hz, 1H), 2.07-2.02 (m, 2H), 1.82 (d, J=1.82 Hz,3H), 1.40 (s, 9H). LC/MS: Anal. Calcd. for C₁₇H₂₅NO₂: 275; found: 276(M+H)⁺.

Step 2: To a stirred solution of the intermediate ester (1.12 g, 2.88mmol) in dichloromethane (10 mL) was added TFA (3 mL). The reactionmixture was stirred at ambient temperature for 4 hours and then it wasconcentrated to dryness to give a light yellow oil. The oil was purifiedusing reverse-phase preparative HPLC (Primesphere C-18, 30×100 mm;CH₃CN—H₂O-0.1% TFA). The appropriate fractions were combined andconcentrated to dryness in vacuo. The residue was then dissolved in aminimum amount of methanol and applied to applied to MCX LP extractioncartridges (2×6 g). The cartridges were rinsed with methanol (40 mL) andthen the desired compound was eluted using 2M ammonia in methanol (50mL). Product-containing fractions were combined and concentrated and theresidue was taken up in water. Lyophilization of this solution providedthe title compound (0.492 g, 78%) as a light yellow solid. ¹HNMR(DMSO-d₆) δ 7.50 (s, 5H), 5.13 (s, 1H), 3.09 (br s, 2H), 2.92-2.89 (m,2H), 1.74 (m, 4H), 1.48 (br s, 2H). LC/MS: Anal. Calcd. for C₁₃H₁₇NO₂:219; found: 220 (M+H)⁻.

Step 1; (S)-1-Phenylethyl 2-bromo-2-phenylacetate: To a mixture ofα-bromophenylacetic acid (10.75 g, 0.050 mol), (S)-(−)-1-phenylethanol(7.94 g, 0.065 mol) and DMAP (0.61 g, 5.0 mmol) in dry dichloromethane(100 mL) was added solid EDCI (12.46 g, 0.065 mol) all at once. Theresulting solution was stirred at room temperature under Ar for 18 hoursand then it was diluted with ethyl acetate, washed (H₂O×2, brine), dried(Na₂SO₄), filtered, and concentrated to give a pale yellow oil. Flashchromatography (SiO₂/hexane-ethyl acetate, 4:1) of this oil provided thetitle compound (1 1.64 g, 73%) as a white solid. ¹HNMR (400 MHz, CDCl₃)δ 7.53-7.17 (m, 10H), 5.95 (q, J=6.6 Hz, 0.5H), 5.94 (q, J=6.6 Hz,0.5H), 5.41 (s, 0.5H), 5.39 (s, 0.5H), 1.58 (d, J=6.6 Hz, 1.5H), 1.51(d, J=6.6 Hz, 1.5H).

Step 2; (S)-1-Phenylethyl(R)-2-(4-hydroxy-4-methylpiperidin-1-yl)-2-phenylacetate: To a solutionof (S)-1-phenylethyl 2-bromo-2-phenylacetate (0.464 g, 1.45 mmol) in THF(8 mL) was added triethylamine (0.61 mL, 4.35 mmol), followed bytetrabutylammonium iodide (0.215 g, 0.58 mmol). The reaction mixture wasstirred at room temperature for 5 minutes and then a solution of4-methyl-4-hydroxypiperidine (0.251 g, 2.18 mmol) in THF (2 mL) wasadded. The mixture was stirred for 1 hour at room temperature and thenit was heated at 55-60° C. (oil bath temperature) for 4 hours. Thecooled reaction mixture was then diluted with ethyl acetate (30 mL),washed (H₂O×2, brine), dried (MgSO₄), filtered and concentrated. Theresidue was purified by silica gel chromatography (0-60% ethylacetate-hexane) to provide first the (S,R)-isomer of the title compound(0.306 g, 60%) as a white solid and then the corresponding (S,S)-isomer(0. 120 g, 23%), also as a white solid. (S,R)-isomer: ¹HNMR (CD₃OD) δ7.51-7.45 (m, 2H), 7.41-7.25 (m, 8H), 5.85 (q, J=6.6 Hz, 1H), 4.05 (s,1H), 2.56-2.45 (m, 2H), 2.41-2.29 (m, 2H), 1.71-1.49 (m, 4H), 1.38 (d,J=6.6 Hz, 3H), 1.18 (s, 3H). LCMS: Anal. Calcd. for C₂₂H₂₇NO₃: 353;found: 354 (M+H)⁺. (S,S)-isomer: ¹HNMR (CD₃OD) δ 7.41-7.30 (m, 5H),7.20-7.14 (m, 3H), 7.06-7.00 (m, 2H), 5.85 (q, J=6.6 Hz, 1H), 4.06 (s,1H), 2.70-2.60 (m, 1H), 2.51 (dt, J=6.6, 3.3 Hz, 1H), 2.44-2.31 (m, 2H),1.75-1.65 (m, 1H), 1.65-1.54 (m, 3H), 1.50 (d, J=6.8 Hz, 3H), 1.20 (s,3H). LCMS: Anal. Calcd. for C₂₂H₂₇NO₃: 353; found: 354 (M+H)⁺.

Step 3; (R)-2-(4-Hydroxy-4-methylpiperidin-1-yl)-2-phenylacetic acid: Toa solution of (S)-1-phenylethyl(R)-2-(4-hydroxy-4-methylpiperidin-1-yl)-2-phenylacetate (0.185 g, 0.52mmol) in dichloromethane (3 mL) was added trifluoroacetic acid (1 mL)and the mixture was stirred at room temperature for 2 hours. Thevolatiles were subsequently removed in vacuo and the residue waspurified by reverse-phase preparative HPLC (Primesphere C-18, 20×100 mm;CH₃CN—H₂O-0.1% TFA) to give the title compound (as TFA salt) as a palebluish solid (0.128 g, 98%). LCMS: Anal. Calcd. for C₁₄H₁₉NO₃: 249;found: 250 (M+H)⁺.

Step 1; (S)-1-Phenylethyl 2-(2-fluorophenyl)acetate: A mixture of2-fluorophenylacetic acid (5.45 g, 35.4 mmol), (S)-1-phenylethanol (5.62g, 46.0 mmol), EDCI (8.82 g, 46.0 mmol) and DMAP (0.561 g, 4.60 mmol) inCH₂Cl₂ (100 mL) was stirred at room temperature for 12 hours. Thesolvent was then concentrated and the residue partitioned with H₂O-ethylacetate. The phases were separated and the aqueous layer back-extractedwith ethyl acetate (2×). The combined organic phases were washed (H₂O,brine), dried (Na₂SO₄), filtered, and concentrated in vacuo. The residuewas purified by silica gel chromatography (Biotage/0-20% ethylacetate-hexane) to provide the title compound as a colorless oil (8.38g, 92%). ¹HNMR (400 MHz, CD₃OD) δ 7.32-7.23 (m, 7H), 7.10-7.04 (m, 2),5.85 (q, J=6.5 Hz, 1H), 3.71 (s, 2H), 1.48 (d, J=6.5 Hz, 3H).

Step 2; (R)—((S)-1-Phenylethyl)2-(2-fluorophenyl)-2-(piperidin-1-yl)acetate: To a solution of(S)-1-phenylethyl 2-(2-fluorophenyl)acetate (5.00 g, 19.4 mmol) in THF(1200 mL) at 0° C. was added DBU (6.19 g, 40.7 mmol) and the solutionwas allowed to warm to room temperature while stirring for 30 minutes.The solution was then cooled to −78° C. and a solution of CBr₄ (13.5 g,40.7 mmol) in THF (100 mL) was added and the mixture was allowed to warmto −10° C. and stirred at this temperature for 2 hours. The reactionmixture was quenched with saturated aq. NH₄Cl and the layers wereseparated. The aqueous layer was back-extracted with ethyl acetate (2×)and the combined organic phases were washed (H₂O, brine), dried(Na₂SO₄), filtered, and concentrated in vacuo. To the residue was addedpiperidine (5.73 mL, 58.1 mmol) and the solution was stirred at roomtemperature for 24 hours. The volatiles were then concentrated in vacuoand the residue was purified by silica gel chromatography (Biotage/0-30%diethyl ether-hexane) to provide a pure mixture of diastereomers (2:1ratio by ¹HNMR) as a yellow oil (2.07 g, 31%), along with unreactedstarting material (2.53 g, 51%). Further chromatography of thediastereomeric mixture (Biotage/0-10% diethyl ether-toluene) providedthe title compound as a colorless oil (0.737 g, 1 1%). ¹HNMR (400 MHz,CD₃OD) δ 7.52 (ddd, J=9.4, 7.6, 1.8 Hz, 1H), 7.33-7.40 (m, 1), 7.23-7.23(m, 4H), 7.02-7.23 (m, 4H), 5.86 (q, J=6.6 Hz, 1H), 4.45 (s, 1H),2.39-2.45 (m, 4H), 1.52-1.58 (m, 4H), 1.40-1.42 (m, 1H), 1.38 (d, J=6.6Hz, 3H). LCMS: Anal. Calcd. for C₂₁H₂₄FNO₂: 341; found: 342 (M+H)⁺.

Step 3; (R)-2-(2-fluorophenyl)-2-(piperidin-1-yl)acetic acid: A mixtureof (R)—((S)-1-phenylethyl) 2-(2-fluorophenyl)-2-(piperidin-1-yl)acetate(0.737 g, 2.16 mmol) and 20% Pd(OH)₂/C (0.070 g)in ethanol (30 mL) washydrogenated at room temperature and atmospheric pressure (H₂ balloon)for 2 hours. The solution was then purged with Ar, filtered throughdiatomaceous earth (Celite®), and concentrated in vacuo. This providedthe title compound as a colorless solid (0.503 g, 98%). ¹HNMR (400 MHz,CD₃OD) δ 7.65 (ddd, J=9.1, 7.6, 1.5 Hz, 1H), 7.47-7.53 (m, 1H),7.21-7.30 (m, 2H), 3.07-3.13 (m, 4H), 1.84 (br s, 4H), 1.62 (br s, 2H).LCMS: Anal. Calcd. for C₁₃H₁₆FNO₂: 237; found: 238 (M+H)⁺.

Step 1; (S)-1-Phenylethyl(R)-2-(4-hydroxy-4-phenylpiperidin-1-yl)-2-phenylacetate: To a solutionof (S)-1-phenylethyl 2-bromo-2-phenylacetate (1.50 g, 4.70 mmol) in THF(25 mL) was added triethylamine (1.31 mL, 9.42 mmol), followed bytetrabutylammonium iodide (0.347 g, 0.94 mmol). The reaction mixture wasstirred at room temperature for 5 minutes and then a solution of4-phenyl-4-hydroxypiperidine (1.00 g, 5.64 mmol) in THF (5 mL) wasadded. The mixture was stirred for 16 hours and then it was diluted withethyl acetate (100 mL), washed (H₂O×2, brine), dried (MgSO₄), filteredand concentrated. The residue was purified on a silica gel column (0-60%ethyl acetate-hexane) to provide an approximately 2:1 mixture ofdiastereomers, as judged by ¹HNMR. Separation of these isomers wasperformed using supercritical fluid chromatography (Chiralcel OJ-H,30×250 mm; 20% ethanol in CO₂ at 35° C.), to give first the (R)-isomerof the title compound (0.534 g, 27%) as a yellow oil and then thecorresponding (S)-isomer (0.271 g, 14%), also as a yellow oil.(S,R)-isomer: ¹HNMR (400 MHz, CD₃OD) 6 7.55-7.47 (m, 4H), 7.44-7.25 (m,10H), 7.25-7.17 (m, 1H), 5.88 (q, J=6.6 Hz, 1H), 4.12 (s, 1H), 2.82-2.72(m, 1H), 2.64 (dt, J=11.1, 2.5 Hz, 1H), 2.58-2.52 (m, 1H), 2.40 (dt,J=11.1, 2.5 Hz, 1H), 2.20 (dt, J=12.1, 4.6 Hz, 1H), 2.10 (dt, J=12.1,4.6 Hz, 1H), 1.72-1.57 (m, 2H), 1.53 (d, J=6.5 Hz, 3H). LCMS: Anal.Calcd. for C₂₇H₂₉NO₃: 415; found: 416 (M+H)⁺; (S,S)-isomer: ¹HNMR (400MHz, CD₃OD) δ 7.55-7.48 (m, 2H), 7.45-7.39 (m, 2H), 7.38-7.30 (m, 5H),7.25-7.13 (m, 4H), 7.08-7.00 (m, 2H), 5.88 (q, J=6.6 Hz, 1H), 4.12 (s,1H), 2.95-2.85 (m, 1H), 2.68 (dt, J=11.1, 2.5 Hz, 1H), 2.57-2.52 (m,1H), 2.42 (dt, J=11.1, 2.5 Hz, 1H), 2.25 (dt, J=12.1, 4.6 Hz, 1H), 2.12(dt, J=12.1, 4.6 Hz, 1H), 1.73 (dd, J=13.6, 3.0 Hz, 1H), 1.64 (dd,J=13.6, 3.0 Hz, 1H), 1.40 (d, J=6.6 Hz, 3H). LCMS: Anal. Calcd. forC₂₇H₂₉NO₃: 415; found: 416 (M+H)⁺.

The following esters were prepared in similar fashion employing step 1in the synthesis of Cap-17.

Intermediate-17a

Diastereomer 1:¹H NMR(500 MHz,DMSO-d₆) δppm 1.36(d, J=6.41Hz,3H)2.23-2.51(m, 4H)3.35(s, 4H)4.25(s, 1H)5.05(s, 2H)5.82(d, J=6.71Hz,1H)7.15-7.52(m,15H).LCMS:Anal. Calcd.for:C₂₈H₃₀N₂O₄458.55; Found:459.44(M +H)⁺.Diastereomer 2:¹H NMR(500 MHz,DMSO-d₆) δppm 1.45(d, J=6.71Hz,3H)2.27-2.44(m, 4H)3.39(s, 4H)4.23(s, 1H)5.06(s, 2H)5.83(d, J=6.71Hz,1H)7.12(dd, J=6.41,3.05Hz, 2H) 7.19-7.27(m, 3H) 7.27-7.44(m,10H).LCMS:Anal.Calcd.for:C₂₈H₃₀N₂O₄458.55; Found:459.44 (M + H)⁺. Intermediate-17b

Diasteromer 1:RT = 11.76min (Cond'n II);LCMS:Anal. Calcd. for:C₂₀H₂₂N₂O₃338.4Found: 339.39(M + H)⁺;Diastereomer 2: RT =10.05 min (Cond'nII);LCMS:Anal. Calcd.for:C₂₀H₂₂N₂O₃ 338.4;Found:339.39 (M + H)⁺.Intermediate-17c

Diastereomer 1:T_(R) = 4.55min (Cond'n I);LCMS:Anal. Calcd.for:C₂₁H₂₆N₂O₂ 338.44Found:339.45 (M + H)⁺;Diastereomer 2:T_(R) =6.00min (Cond'n I);LCMS:Anal. Calcd.for:C₂₁H₂₆N₂O₂ 338.44Found:339.45(M + H)⁺. Intermediate-17d

Diastereomer 1:RT = 7.19min (Cond'n I);LCMS:Anal. Calcd. for:C₂₇H₂₉NO₂399.52Found:400.48 (M + H)⁺;Diastereomer 2:RT = 9.76min (Cond'nI);LCMS:Anal. Calcd.for:C₂₇H₂₉NO₂ 399.52Found:400.48 (M + H)⁺.

Chiral SFC Conditions for Determining Retention Time for Intermediates17b-17d Condition 1

-   Column: Chiralpak AD-H Column, 4.6×250 mm, 5 μm-   Solvents: 90% CO2-10% methanol with 0.1% DEA-   Temp: 35° C.-   Pressure: 150 bar-   Flow rate: 2.0 mL/min.-   UV monitored @220 nm-   Injection: 1.0 mg/3mL methanol

Condition 2

-   Column: Chiralcel OD-H Column, 4.6×250 mm, 5 μm-   Solvents: 90% CO2-10% methanol with 0.1% DEA-   Temp: 35° C.-   Pressure: 150 bar-   Flow rate: 2.0 mL/min.-   UV monitored @220 nm-   Injection: 1.0 mg/mL methanol

Cap-17, Step 2; (R)-2-(4-Hydroxy-4-phenylpiperidin-1-yl)-2-phenylaceticacid: To a solution of (S)-1-phenylethyl(R)-2-(4-hydroxy-4-phenylpiperidin-1-yl)-2-phenylacetate (0.350 g, 0.84mmol) in dichloromethane (5 mL) was added trifluoroacetic acid (1 mL)and the mixture was stirred at room temperature for 2 hours. Thevolatiles were subsequently removed in vacuo and the residue waspurified by reverse-phase preparative HPLC (Primesphere C-18, 20×100 mm;CH₃CN-H₂O-0.1% TFA) to give the title compound (as TFA salt) as a whitesolid (0.230 g, 88%). LCMS: Anal. Calcd. for C₁₉H₂₁NO₃: 311; found: 312(M+H)⁺.

The following carboxylic acids were prepared in a similar fashion:

Cap-17a

RT = 2.21 (Cond'n II); ¹HNMR)500 MHz, DMSO-d₆) δ ppm 2.20-2.35(m,2H)2.34-2.47(m, 2H)3.37(s, 4H) 3.71(s, 1H)5.06(s, 2H) 7.06-7.53(m,10H).LCMS: Anal. Calcd.for: C₂₀H₂₂N₂O₄ 354.40;Found: 355.38 (M + H)⁺. Cap-17b

RT = 0.27 (Cond'n III);LCMS: Anal. Calcd. for:C₁₂H₁₄N₂O₃234.25;Found:235.22 (M + H)⁺. Cap-17c

RT = 0.48 (Cond'n II);LCMS: Anal. Calcd. for:C₁₃H₁₈N₂O₂234.29;Found:235.31 (M + H)⁺. Cap-17d

RT = 2.21 (Cond'n I);LCMS: Anal. Calcd. for:C₁₉H₂₁NO₂ 295.38;Found:296.33 (M + H)⁺.

LCMS Conditions for Determining Retention Time for Caps 17a-17dCondition 1

-   Column: Phenomenex-Luna 4.6×50 mm S10-   Start % B=0-   Final % B=100-   Gradient Time=4 min-   Flow Rate=4 mL/min-   Wavelength=220-   Solvent A=10% methanol −90% H₂O-0. 1% TFA-   Solvent B=90% methanol -10% H₂O-0. 1% TFA

Condition 2

-   Column: Waters-Sunfire 4.6×50 mm S5-   Start % B=0-   Final % B=100-   Gradient Time=2 min-   Flow Rate=4 mL/min-   Wavelength=220-   Solvent A=10% methanol −90% H₂O-0. 1% TFA-   Solvent B=90% methanol −10% H₂O-0. 1% TFA

Condition 3

-   Column: Phenomenex 10μ 3.0×50 mm-   Start % B=0-   Final % B=100-   Gradient Time=2 min-   Flow Rate=4 mL/min-   Wavelength=220-   Solvent A=10% methanol −90% H₂O-0. 1% TFA-   Solvent B=90% methanol −10% H₂O-0. 1% TFA

Step 1; (R,S)-Ethyl 2-(4-pyridyl)-2-bromoacetate: To a solution of ethyl4-pyridylacetate (1.00 g, 6.05 mmol) in dry THF (150 mL) at 0° C. underargon was added DBU (0.99 mL, 6.66 mmol). The reaction mixture wasallowed to warm to room temperature over 30 minutes and then it wascooled to −78° C. To this mixture was added CBr₄ (2.21 g, 6.66 mmol) andstirring was continued at −78° C. for 2 hours. The reaction mixture wasthen quenched with sat. aq. NH₄Cl and the phases were separated. Theorganic phase was washed (brine), dried (Na₂SO₄), filtered, andconcentrated in vacuo. The resulting yellow oil was immediately purifiedby flash chromatography (SiO₂/hexane-ethyl acetate, 1:1) to provide thetitle compound (1.40 g, 95%) as a somewhat unstable yellow oil. ¹HNMR(400 MHz, CDCl₃) 6 8.62 (dd, J=4.6, 1.8 Hz, 2H), 7.45 (dd, J=4.6, 1.8Hz, 2H), 5.24 (s, 1H), 4.21-4.29 (m, 2H), 1.28 (t, J=7.1 Hz, 3H). LCMS:Anal. Calcd. for C₉H₁₀BrNO₂: 242, 244; found: 243, 245 (M+H)⁺.

Step 2; (R,S)-Ethyl 2-(4-pyridyl)-2-(N,N-dimethylamino)acetate: To asolution of (R,S)-ethyl 2-(4-pyridyl)-2-bromoacetate (1.40 g, 8.48 mmol)in DMF (10 mL) at room temperature was added dimethylamine (2M in THF,8.5 mL, 17.0 20 mmol). After completion of the reaction (as judged bytlc) the volatiles were removed in vacuo and the residue was purified byflash chromatography (Biotage, 40+M SiO₂ column; 50%-100% ethylacetate-hexane) to provide the title compound (0.539 g, 31%) as a lightyellow oil. ¹HNMR (400 MHz, CDCl₃) δ 8.58 (d, J=6.0 Hz, 2H), 7.36 (d,J=6.0 Hz, 2H), 4.17 (m, 2H), 3.92 (s, 1H), 2.27 (s, 6H), 1.22 (t, J=7.0Hz). LCMS: Anal. Calcd. for C₁₁H₁₆N₂O₂: 208; found: 209 (M+H)⁺.

Step 3; (R,S)-2-(4-Pyridyl)-2-(N,N-dimethylamino)acetic acid: To asolution of (R,S)-ethyl 2-(4-pyridyl)-2-(N,N-dimethylamino)acetate(0.200 g, 0.960 mmol) in a mixture of THF-methanol-H₂O (1:1:1, 6 mL) wasadded powdered LiOH (0.120 g, 4.99 mmol) at room temperature. Thesolution was stirred for 3 hours and then it was acidified to pH 6 using1N HCl. The aqueous phase was washed with ethyl acetate and then it waslyophilized to give the dihydrochloride of the title compound as ayellow solid (containing LiCl). The product was used as such insubsequent steps. ¹HNMR (400 MHz, DMSO-d₆) δ 8.49 (d, J=5.7 Hz, 2H),7.34 (d, J=5.7 Hz, 2H), 3.56 (s, 1H), 2.21 (s, 6H).

The following examples were prepared in similar fashion using the methoddescribed in the above procedure:

Cap-19

LCMS: Anal.Calcd. for C₉H₁₂N₂O₂:180; found: 181 (M + H)⁺. Cap-20

LCMS: no ionization.¹HNMR(400MHz, CD₃OD)δ 8.55(d, J=4.3Hz,1H), 7.84(appt,J=5.3Hz, 1H), 7.61(d, J=7.8Hz, 1H),7.37(app t, J=5.3Hz,1H), 4.35(s,1H), 2.60(s, 6H). Cap-21

LCMS: Anal. Calcd. forC₉H_(11Cl)N₂O₂:214, 216;found: 215, 217 (M + H)⁺.Cap-22

LCMS: Anal. Calcd. forC₁₀H₁₂N₂O₄:224; found: 225 (M + H)⁺. Cap-23

LCMS: Anal. Calcd. forC₁₄H₁₅NO₂:247; found: 248 (M + H)⁺. Cap-24

LCMS: Anal. Calcd. forC₁₁H₁₂F₃NO₂:247; found: 248 (M + H)⁺. Cap-25

LCMS: Anal. Calcd. forC₁₁H₁₂F₃NO₂:247; found: 248 (M + H)⁺. Cap-26

LCMS: Anal. Calcd. forC₁₀H₁₂FNO₂:247; found: 248 (M + H)⁺. Cap-27

LCMS: Anal. Calcd. forC₁₀H₁₂FNO₂:247; found: 248 (M + H)⁺. Cap-28

LCMS: Anal. Calcd. forC₁₀H₁₂ClNO₂:213, 215; found:214, 217 (M + H)⁺.Cap-29

LCMS: Anal. Calcd. forC₁₀H₁₂ClNO₂:213, 215; found:214, 217 (M + H)⁺.Cap-30

LCMS: Anal. Calcd. forC₁₀H₁₂ClNO₂:213, 215; found:214, 217 (M + H)⁺.Cap-31

LCMS: Anal. Calcd. forC₈H₁₁N₂O₂S:200; found: 201 (M + H)⁺. Cap-32

LCMS: Anal. Calcd. forC₈H₁₁NO₂S:185; found: 186 (M + H)⁺. Cap-33

LCMS: Anal. Calcd. forC₈H₁₁NO₂S:185; found: 186 (M + H)⁺. Cap-34

LCMS: Anal. Calcd. forC₁₁H₁₂N₂O₃:220; found: 221 (M + H)⁺. Cap-35

LCMS: Anal. Calcd. forC₁₂H₁₃NO₂S:235; found: 236 (M + H)⁺. Cap-36

LCMS: Anal. Calcd. forC₁₂H₁₄N₂O₂S:250; found: 251 (M + H)⁺.

Step 1; (R,S)-Ethyl 2-(quinolin-3-yl)-2-(N,N-dimethylamino)-acetate: Amixture of ethyl N,N-dimethylaminoacetate (0.462 g, 3.54 mmol), K₃PO₄(1.90 g, 8.95 mmol), Pd(t-Bu₃P)₂ (0.090 g, 0.176 mmol) and toluene (10mL) was degassed with a stream of Ar bubbles for 15 minutes. Thereaction mixture was then heated at 100° C. for 12 hours, after which itwas cooled to room temperature and poured into H₂O. The mixture wasextracted with ethyl acetate (2×) and the combined organic phases werewashed (H₂O, brine), dried (Na₂SO₄), filtered, and concentrated invacuo. The residue was purified first by reverse-phase preparative HPLC(Primesphere C-18, 30×100 mm; CH₃CN—H₂O-5 mM NH₄OAc) and then by flashchromatography (SiO₂/hexane-ethyl acetate, 1:1) to provide the titlecompound (0.128 g, 17%) as an orange oil. ¹HNMR (400 MHz, CDCl₃) δ 8.90(d, J=2.0 Hz, 1H), 8.32 (d, J=2.0 Hz, 1H), 8.03-8.01 (m, 2H), 7.77 (ddd,J=8.3, 6.8, 1.5 Hz, 1H), 7.62 (ddd, J=8.3, 6.8, 1.5 Hz, 1H), 4.35 (s,1H), 4.13 (m, 2H), 2.22 (s, 6H), 1.15 (t, J=7.0 Hz, 3H). LCMS: Anal.Calcd. for C₁₅H₁₈N₂O₂: 258; found: 259 (M+H)⁺.

Step 2; (R,S) 2-(Quinolin-3-yl)-2-(N,N-dimethylamino)acetic acid: Amixture of (R,S)-ethyl 2-(quinolin-3-yl)-2-(N,N-dimethylamino)acetate(0.122 g, 0.472 mmol) and 6M HCl (3 mL) was heated at 100° C. for 12hours. The solvent was removed in vacuo to provide the dihydrochlorideof the title compound (0.169 g, >100%) as a light yellow foam. Theunpurified material was used in subsequent steps without furtherpurification. LCMS: Anal. Calcd. for C₁₃H₁₄N₂O₂: 230; found: 231 (M+H)⁺.

Step 1; (R)—((S)-1-phenylethyl)2-(dimethylamino)-2-(2-fluorophenyl)acetate and (S)—((S)-1-phenylethyl)2-(dimethylamino)-2-(2-fluorophenyl)acetate: To a mixture of(RS)-2-(dimethylamino)-2-(2-fluorophenyl)acetic acid (2.60 g, 13.19mmol), DMAP (0.209 g, 1.71 mmol) and (S)-1-phenylethanol (2.09 g, 17.15mmol) in CH₂Cl₂ (40 mL) was added EDCI (3.29 g, 17.15 mmol) and themixture was allowed to stir at room temperature for 12 hours. Thesolvent was then removed in vacuo and the residue partitioned with ethylacetate-H₂O. The layers were separated, the aqueous layer wasback-extracted with ethyl acetate (2×) and the combined organic phaseswere washed (H₂O, brine), dried (Na₂SO₄), filtered, and concentrated invacuo. The residue was purified by silica gel chromatography(Biotage/0-50% diethyl ether-hexane). The resulting pure diastereomericmixture was then separated by reverse-phase preparative HPLC(Primesphere C-18, 30×100 mm; CH₃CN—H₂O-0.1% TFA) to give first(S)-1-phenethyl (R)-2-(dimethylamino)-2-(2-fluorophenyl)acetate (0.501g, 13%) and then (S)-1-phenethyl(S)-2-(dimethylamino)-2-(2-fluorophenyl)-acetate (0.727 g. 18%), both astheir TFA salts. (S,R)-isomer: ¹HNMR (400 MHz, CD₃OD) δ 7.65-7.70 (m,1H), 7.55-7.60 (ddd, J=9.4, 8.1, 1.5 Hz, 1H), 7.36-7.41 (m, 2H),7.28-7.34 (m, 5H), 6.04 (q, J=6.5 Hz, 1H), 5.60 (s, 1H), 2.84 (s, 6H),1.43 (d, J=6.5 Hz, 3H). LCMS: Anal. Calcd. for C₁₈H₂₀FNO₂: 301; found:302 (M+H)⁺; (S,S)-isomer: ¹HNMR (400 MHz, CD₃OD) δ 7.58-7.63 (m, 1H),7.18-7.31 (m, 6H), 7.00 (dd, J=8.5, 1.5 Hz, 2H), 6.02 (q, J=6.5 Hz, 1H),5.60 (s, 1H), 2.88 (s, 6H), 1.54 (d, J=6.5 Hz, 3H). LCMS: Anal. Calcd.for C₁₈H₂₀FNO₂: 301; found: 302 (M+H)⁺.

Step 2; (R)-2-(dimethylamino)-2-(2-fluorophenyl)acetic acid: A mixtureof (R)—((S)-1-phenylethyl) 2-(dimethylamino)-2-(2-fluorophenyl)acetateTFA salt (1.25 g, 3.01 mmol) and 20% Pd(OH)₂/C (0. 125 g)in ethanol (30mL) was hydrogenated at room temperature and atmospheric pressure (H₂balloon) for 4 hours. The solution was then purged with Ar, filteredthrough diatomaceous earth (Celite®), and concentrated in vacuo. Thisgave the title compound as a colorless solid (0.503 g, 98%). ¹HNMR (400MHz, CD₃OD) δ 7.53-7.63 (m, 2H), 7.33-7.38 (m, 2H), 5.36 (s, 1H), 2.86(s, 6H). LCMS: Anal. Calcd. for C₁₀H₁₂FNO₂: 197; found: 198 (M+H)⁺.

The S-isomer could be obtained from (S)—((S)-1-phenylethyl)2-(dimethylamino)-2-(2-fluorophenyl)acetate TFA salt in similar fashion.

A mixture of (R)-(2-chlorophenyl)glycine (0.300 g, 1.62 mmol),formaldehyde (35% aqueous solution, 0.80 mL, 3.23 mmol) and 20%Pd(OH)₂/C (0.050 g)was hydrogenated at room temperature and atmosphericpressure (H₂ balloon) for 4 hours. The solution was then purged with Ar,filtered through diatomaceous earth (Celite®) and concentrated in vacuo.The residue was purified by reverse-phase preparative HPLC (PrimesphereC-18, 30×100 mm; CH₃CN—H₂O-0.1% TFA) to give theTFA salt of the titlecompound (R)-2-(dimethylamino)-2-(2-chlorophenyl)acetic acid as acolorless oil (0.290 g, 55%). ¹H NMR (400 MHz, CD₃OD) δ 7.59-7.65 (m,2H), 7.45-7.53 (m, 2H), 5.40 (s, 1H), 2.87 (s, 6H). LCMS: Anal. Calcd.for C₁₀H₁₂ClNO₂: 213, 215; found: 214, 216 (M+H)⁺.

To an ice-cold solution of (R)-(2-chlorophenyl)glycine (1.00 g, 5.38mmol) and NaOH (0.862 g, 21.6 mmol) in H₂O (5.5 mL) was added methylchloroformate (1.00 mL, 13.5 mmol) dropwise. The mixture was allowed tostir at 0° C. for 1 hour and then it was acidified by the addition ofconc. HCl (2.5 mL). The mixture was extracted with ethyl acetate (2×)and the combined organic phase was washed (H₂O, brine), dried (Na₂SO₄),filtered, and concentrated in vacuo to give the title compound(R)-2-(methoxycarbonylamino)-2-(2-chlorophenyl)acetic acid as ayellow-orange foam (1.31 g, 96%). ¹H NMR (400 MHz, CD₃OD) δ 7.39-7.43(m, 2H), 7.29-7.31 (m, 2H), 5.69 (s, 1H), 3.65 (s, 3H). LCMS: Anal.Calcd. for C₁₀H₁₀ClNO₄: 243, 245; found: 244, 246 (M+H)⁺.

To a suspension of 2-(2-(chloromethyl)phenyl)acetic acid (2.00 g, 10.8mmol) in THF (20 mL) was added morpholine (1.89 g, 21.7 mmol) and thesolution was stirred at room temperature for 3 hours. The reactionmixture was then diluted with ethyl acetate and extracted with H₂O (2×).The aqueous phase was lyophilized and the residue was purified by silicagel chromatography (Biotage/0-10% methanol-CH₂Cl₂) to give the titlecompound 2-(2-(Morpholinomethyl)phenyl)acetic acid as a colorless solid(2.22 g, 87%). ¹HNMR (400 MHz, CD₃OD) δ 7.37-7.44 (m, 3H), 7.29-7.33 (m,1H), 4.24 (s, 2H), 3.83 (br s, 4H), 3.68 (s, 2H), 3.14 (br s, 4H). LCMS:Anal. Calcd. for C₁₃H₁₇NO₃: 235; found: 236 (M+H)⁺.

The following caps were similarly prepared using the method describedfor Cap-41:

Cap-42

LCMS: Anal. Calcd. forC₁₄H₁₉NO₂: 233; found:234 (M + H)⁺. Cap-43

LCMS: Anal. Calcd. forC₁₃H₁₇NO₂: 219; found:220 (M + H)⁺. Cap-44

LCMS: Anal. Calcd. forC₁₁H₁₅NO₂: 193; found:194 (M + H)⁺. Cap-45

LCMS: Anal. Calcd. forC₁₄H₂₀N₂O₂: 248; found:249 (M + H)⁺.

HMDS (1.85 mL, 8.77 mmol) was added to a suspension of(R)-2-amino-2-phenylacetic acid p-toluenesulfonate (2.83 g, 8.77 mmol)in CH₂Cl₂ (10 mL) and the mixture was stirred at room temperature for 30minutes. Methyl isocyanate (0.5 g, 8.77 mmol) was added in one portionstirring continued for 30 minutes. The reaction was quenched by additionof H₂O (5 mL) and the resulting precipitate was filtered, washed withH₂O and n-hexanes, and dried under vacuum.(R)-2-(3-methylureido)-2-phenylacetic acid (1.5 g; 82%).was recovered asa white solid and it was used without further purification. ¹H NMR (500MHz, DMSO-d₆) δ ppm 2.54 (d, J=4.88 Hz, 3H) 5.17 (d, J=7.93 Hz, 1H) 5.95(q, J=4.48 Hz, 1H) 6.66 (d, J=7.93 Hz, 1H) 7.26-7.38 (m, 5H) 12.67 (s,1H). LCMS: Anal. Calcd. for C₁₀H₁₂N₂O₃ 208.08 found 209.121 (M+H)⁺; HPLCPhenomenex C-18 3.0×46 mm, 0 to 100% B over 2 minutes, 1 minute holdtime, A=90% water, 10% methanol, 0. 1% TFA, B=10% water, 90% methanol,0.1% TFA, RT=1.38 min, 90% homogeneity index.

The desired product was prepared according to the method described forCap-45. ¹H NMR (500 MHz, DMSO-d₆) δ ppm 0.96 (t, J=7.17 Hz, 3H)2.94-3.05 (m, 2H) 5.17 (d, J=7.93 Hz, 1H) 6.05 (t, J=5.19 Hz, 1H) 6.60(d, J=7.63 Hz, 1H) 7.26-7.38 (m, 5H) 12.68 (s, 1H). LCMS: Anal. Calcd.for C₁₁H₁₄N₂O₃ 222.10 found 209.121 (M+H)⁺.

HPLC XTERRA C-18 3.0×506 mm, 0 to 100% B over 2 minutes, 1 minutes holdtime, A=90% water, 10% methanol, 0.2% H₃PO₄, B=10% water, 90% methanol,0.2% H₃PO₄, RT=0.87 min, 90% homogeneity index.

Step 1; (R)-tert-butyl 2-(3,3-dimethylureido)-2-phenylacetate: To astirred solution of (R)-tert-butyl-2-amino-2-phenylacetate (1.0 g, 4. 10mmol) and Hunig's base (1.79 mL, 10.25 mmol) in DMF (40 mL) was addeddimethylcarbamoyl chloride (0.38 mL, 4.18 mmol) dropwise over 10minutes. After stirring at room temperature for 3 hours, the reactionwas concentrated under reduced pressure and the resulting residue wasdissolved in ethyl acetate. The organic layer was washed with H₂O, 1Naq. HCl and brine, dried (MgSO₄), filtered and concentrated underreduced pressure. (R)-tert-butyl 2-(3,3-dimethylureido)-2-phenylacetatewas obtained as a white solid ( 0.86 g; 75%) and used without furtherpurification. ¹H NMR (500 MHz, DMSO-d₆) δ ppm 1.33 (s, 9H) 2.82 (s, 6H)5.17 (d, J=7.63 Hz, 1H) 6.55 (d, J=7.32 Hz, 1H) 7.24-7.41 (m, 5H). LCMS:Anal. Calcd. for C₁₅H₂₂N₂O₃ 278.16 found 279.23 (M+H)⁺; HPLC PhenomenexLUNA C-18 4.6×50 mm, 0 to 100% B over 4 minutes, 1 minutes hold time,A=90% water, 10% methanol, 0.1% TFA, B=10% water, 90% methanol, 0.1%TFA, RT=2.26 min, 97% homogeneity index.

Step 2; (R)-2-(3,3-dimethylureido)-2-phenylacetic acid: To a stirredsolution of ((R)-tert-butyl 2-(3,3-dimethylureido)-2-phenylacetate (0.86g, 3.10 mmol) in CH₂Cl₂ (250 mL) was added TFA (15 mL) dropwise and theresulting solution was stirred at rt for 3 h. The desired compound wasthen precipitated out of solution with a mixture of EtOAC:Hexanes(5:20), filtered off and dried under reduced pressure.(R)-2-(3,3-dimethylureido)-2-phenylacetic acid was isolated as a whitesolid (0.59 g, 86%) and used without further purification. ¹H NMR (500MHz, DMSO-d₆) δ ppm 2.82 (s, 6H) 5.22 (d, J=7.32 Hz, 1H) 6.58 (d, J=7.32Hz, 1H) 7.28 (t, J=7.17 Hz, 1H) 7.33 (t, J=7.32 Hz, 2H) 7.38-7.43 (m,2H) 12.65 (s, 1H). LCMS: Anal. Calcd. for C₁₁H₁₄N₂O₃: 222.24; found:223.21 (M+H)⁺. HPLC XTERRA C-18 3.0×50 mm, 0 to 100% B over 2 minutes, 1minutes hold time, A=90% water, 10% methanol, 0.2% H₃PO₄, B=10% water,90% methanol, 0.2% H₃PO₄, RT=0.75 min, 93% homogeneity index.

Step 1; (R)-tert-butyl 2-(3-cyclopentylureido)-2-phenylacetate: To astirred solution of (R)-2-amino-2-phenylacetic acid hydrochloride (1.0g, 4. 10 mmol) and Hunig's base (1.0 mL, 6.15 mmol) in DMF (15 mL) wasadded cyclopentyl isocyanate (0.46 mL, 4. 10 mmol) dropwise and over 10minutes. After stirring at room temperature for 3 hours, the reactionwas concentrated under reduced pressure and the resulting residue wastraken up in ethyl acetate. The organic layer was washed with H₂O andbrine, dried (MgSO₄), filtered, and concentrated under reduced pressure.(R)-tert-butyl 2-(3-cyclopentylureido)-2-phenylacetate was obtained asan opaque oil (1.32 g; 100%) and used without further purification. ¹HNMR (500 MHz, CD₃Cl-D) δ ppm 1.50-1.57 (m, 2H) 1.58-1.66 (m, 2H)1.87-1.97 (m, 2H) 3.89-3.98 (m, 1H) 5.37 (s, 1H) 7.26-7.38 (m, 5H).LCMS: Anal. Calcd. for C₁₈H₂₆N₂O₃ 318.19 found 319.21 (M+H)⁺; HPLCXTERRA C-18 3.0×50 mm, 0 to 100% B over 4 minutes, 1 minutes hold time,A=90% water, 10% methanol, 0.1% TFA, B=10% water, 90% methanol, 0. 1%TFA, RT=2.82 min, 96% homogeneity index.

Step 2; (R)-2-(3-cyclopentylureido)-2-phenylacetic acid: To a stirredsolution of (R)-tert-butyl 2-(3-cyclopentylureido)-2-phenylacetate (1.31 g, 4.10 mmol) in CH₂Cl₂ (25 mL) was added TFA (4 mL) andtrietheylsilane (1.64 mL; 10.3 mmol) dropwise, and the resultingsolution was stirred at room temperature for 6 hours. The volatilecomponents were removed under reduced pressure and the crude product wasrecrystallized in ethyl acetate/pentanes to yield(R)-2-(3-cyclopentylureido)-2-phenylacetic acid as a white solid (0.69g, 64%). ¹H NMR (500 MHz, DMSO-d₆) δ ppm 1.17-1.35 (m, 2H) 1.42-1.52 (m,2H) 1.53-1.64 (m, 2H) 1.67-1.80 (m, 2H) 3.75-3.89 (m, 1H) 5.17 (d,J=7.93 Hz, 1H) 6.12 (d, J=7.32 Hz, 1H) 6.48 (d, J=7.93 Hz, 1H) 7.24-7.40(m, 5H) 12.73 (s, 1H). LCMS: Anal. Calcd. for C₁₄H₁₈N₂O₃: 262.31; found:263.15 (M+H)⁺. HPLC XTERRA C-18 3.0×50 mm, 0 to 100% B over 2 minutes, 1minutes hold time, A=90% water, 10% methanol, 0.2% H₃PO₄, B=10% water,90% methanol, 0.2% H₃PO₄, RT=1.24 min, 100% homogeneity index.

To a stirred solution of 2-(benzylamino)acetic acid (2.0 g, 12.1 mmol)in formic acid (91 mL) was added formaldehyde (6.94 mL, 93.2 mmol).After five hours at 70° C., the reaction mixture was concentrated underreduced pressure to 20 mL and a white solid precipitated. Followingfiltration, the mother liquors were collected and further concentratedunder reduced pressure providing the crude product. Purification byreverse-phase preparative HPLC (Xterra 30×100 mm, detection at 220 nm,flow rate 35 mL/min, 0 to 35% B over 8 min; A=90% water, 10% methanol,0. 1% TFA, B=10% water, 90% methanol, 0. 1% TFA) provided the titlecompound 2-(benzyl(methyl)-amino)acetic acid as its TFA salt (723 mg,33%) as a colorless wax. ¹H NMR (300 MHz, DMSO-d₆) δ ppm 2.75 (s, 3H)4.04 (s, 2H) 4.34 (s, 2H) 7.29-7.68 (m, 5H). LCMS: Anal. Calcd. for:C₁₀H₁₃NO₂ 179.22; Found: 180.20 (M+H)⁺.

To a stirred solution of 3-methyl-2-(methylamino)butanoic acid (0.50 g,3.81 mmol) in water ( 30 mL) was added K₂CO₃ (2.63 g, 19.1 mmol) andbenzyl chloride (1.32 g, 11.4 mmol). The reaction mixture was stirred atambient temperature for 18 hours. The reaction mixture was extractedwith ethyl acetate (30 mL×2) and the aqueous layer was concentratedunder reduced pressure providing the crude product which was purified byreverse-phase preparative HPLC (Xterra 30×100 mm, detection at 220 nm,flow rate 40 mL/min, 20 to 80% B over 6 min; A=90% water, 10% methanol,0.1% TFA, B=10% water, 90% methanol, 0.1% TFA) to provide2-(benzyl(methyl)amino)-3-methylbutanoic acid, TFA salt (126 mg, 19%) asa colorless wax. 1H NMR (500 MHz, DMSO-d₆) δ ppm 0.98 (d, 3H) 1.07 (d,3H) 2.33-2.48 (m, 1H) 2.54-2.78 (m, 3H) 3.69 (s, 1H) 4.24 (s, 2H)7.29-7.65 (m, 5H). LCMS: Anal. Calcd. for: C₁₃H₁₉NO₂ 221.30; Found:222.28 (M+H)⁺.

Na₂CO₃ (1.83 g, 17.2 mmol) was added to NaOH (33 mL of 1M/H₂O, 33 mmol)solution of L-valine (3.9 g, 33.29 mmol) and the resulting solution wascooled with ice-water bath. Methyl chloroformate (2.8 mL, 36.1 mmol) wasadded drop-wise over 15 min, the cooling bath was removed and thereaction mixture was stirred at ambient temperature for 3.25 hr. Thereaction mixture was washed with ether (50 mL, 3×), and the aqueousphase was cooled with ice-water bath and acidified with concentrated HClto a pH region of 1-2, and extracted with CH₂Cl₂ (50 mL, 3×). Theorganic phase was dried (MgSO₄), filtered, and concentrated in vacuo toafford Cap-51 as a white solid (6 g). ¹H NMR for the dominant rotamer(DMSO-d₆, δ=2.5 ppm, 500 MHz): 12.54 (s, 1H), 7.33 (d, J=8.6, 1H), 3.84(dd, J=8.4, 6.0, 1H), 3.54 (s, 3H), 2.03 (m, 1H), 0.87 (m, 6H). HRMS:Anal. Calcd. for [M+H]⁺ C₇H₁₄NO₄: 176.0923; found 176.0922

Cap-52 was synthesized from L-alanine according to the proceduredescribed for the synthesis of Cap-51. For characterization purposes, aportion of the crude material was purified by a reverse phase HPLC(H₂O/MeOH/TFA) to afford Cap-52 as a colorless viscous oil. ¹H NMR(DMSO-d₆, δ=2.5 ppm, 500 MHz): 12.49 (br s, 1H), 7.43 (d, J=7.3, 0.88H),7.09 (app br s, 0.12H), 3.97 (m, 1H), 3.53 (s, 3H), 1.25 (d, J=7.3, 3H).

Cap-53 to -64 were prepared from appropriate starting materialsaccording to the procedure described for the synthesis of Cap-51, withnoted modifications if any.

Cap Structure Data Cap-53a: (R)Cap-53b: (S)

¹H NMR(DMSO-d₆, δ 2.5 ppm, 500 MHz):δ 12.51(br s, 1H), 7.4(d, J=7.9,0.9H), 7.06(app s, 0.1H), 3.86-3.82(m, 1H), 3.53(s, 3H),1.75-1.67(m,1H), 1.62-1.54(m, 1H), 0.88(d,J=7.3, 3H). RT = 0.77 minutes (Cond.2);LC/MS: Anal. Calcd.for [M + Na]⁺C₆H₁₁NNaO₄: 184.06; found 184.07.HRMSCalcd. for [M + Na]⁺ C₆H₁₁NNaO₄: 184.0586;found 184.0592. Cap-54a:(R)Cap-54b: (S)

¹H NMR(DMSO-d₆, δ 2.5 ppm, 500 MHz);δ 12.48(s, 1H), 7.58(d, J=7.6,0.9H), 7.25(app s, 0.1H), 3.52(s, 3H), 3.36-3.33(m, 1H),1.10-1.01(m,1H), 0.54-0.49(m, 1H), 0.46-0.40(m, 1H), 0.39-0.35(m, 1H),0.31-0.21(m,1H). HRMS: Calcd. for [M + H]⁺ C₇H₁₂NO₄:174.0766; found174.0771 Cap-55

¹H NMR(DMSO-d₆, δ 2.5 ppm, 500 MHz);δ 12.62(s, 1H), 7.42(d, J=8.2,0.9H), 7.07(app s, 0.1H), 5.80-5.72(m, 1H), 5.10(d, J=17.1,1H), 5.04(d,J=10.4, 1H), 4.01-3.96(m, 1H), 3.53(s, 3H), 2.47-2.42(m, 1H),2.35-2.29(m, 1H). Cap-56

¹H NMR(DMSO-d₆, δ = 2.5 ppm, 500 MHz):δ 12.75(s, 1H), 7.38(d, J=8.3,0.9H), 6.96(app s, 0.1H), 4.20-4.16(m, 1H), 3.60-3.55(m,2H), 3.54(s,3H), 3.24(s, 3H). Cap-57

¹H NMR(DMSO-d₆, δ = 2.5 ppm, 500 MHz):δ 12.50(s, 1H), 8.02(d, J=7.7,0.08H), 7.40(d, J=7.9, 0.76H), 7.19(d, J=8.2, 0.07H),7.07(d, J=6.7,0.09H), 4.21-4.12(m, 0.08H),4.06-3.97(m, 0.07H), 3.96-3.80(m,0.85H),3.53(s, 3H), 1.69-1.51(m, 2H), 1.39-1.26(m,2H), 0.85(t, J=7.4,3H).LC(Cond. 2): RT =1.39LC/MS: Anal. Calcd. for [M + H]⁻C₇H₁₄NO₄:176.09; found 176.06. Cap-58

¹H NMR(DMSO-d₆, δ = 2.5 ppm, 500 MHz):δ 12.63(bs, 1H), 7.35(s, 1H),7.31(d, J=8.2,1H), 6.92(s, 1H), 4.33-4.29(m, 1H), 3.54(s,3H), 2.54(dd,J=15.5, 5.4, 1H), 2.43(dd, J=15.6, 8.0, 1H). RT = 0.16 min (Cond.2);LC/MS: Anal. Calcd. for [M + H]⁺ C₆H₁₁N₂O₅:191.07; found 191.14.Cap-59a: (R)Cap-59b: (S)

¹H NMR(DMSO-d₆, δ 2.5 ppm, 400 MHz):δ 12.49(br s, 1H), 7.40(d, J=7.3,0.89H),7.04(br s, 0.11H), 4.00-3.95(m, 3H), 1.24(d, J=7.3,3H), 1.15(t,J=7.2, 3H). HRMS: Anal.Calcd. for [M + H]⁺ C₆H₁₂NO₄: 162.0766;found162.0771. Cap-60

The crude material was purified with a reversephase HPLC (H₂O/MeOH/TFA)to afford acolorless viscous oil that crystallized to a whitesolid uponexposure to high vacuum. ¹H NMR(DMSO-d₆, δ = 2.5 ppm, 400 MHz): δ12.38(br s, 1H), 7.74(s, 0.82H), 7.48(s, 0.18H),3.54/3.51(two s, 3H),1.30(m, 2H),0.98(m,2H). HRMS: Anal. Calcd. for [M + H]⁺C₆H₁₀NO₄:160.0610; found 160.0604. Cap-61

¹H NMR(DMSO-d₆, δ = 2.5 ppm, 400 MHz):δ 12.27(br s, 1H), 7.40(br s, 1H),3.50(s, 3H),1.32(s, 6H). HRMS: Anal. Calcd. for[M + H]⁺ C₆H₁₂NO₄:162.0766; found 162.0765. Cap-62

¹H NMR(DMSO-d₆, δ = 2.5 ppm, 400 MHz):δ 12.74(br s, 1H), 4.21(d, J=10.3,0.6H),4.05(d, J=10.0, 0.4H), 3.62/3.60(twosinglets, 3H), 3.0(s, 3H),2.14-2.05(m, 1H),0.95(d, J=6.3, 3H), 0.81(d, J=6.6, 3H).LC/MS: Anal.Calcd. for [M − H]⁻ C₈H₁₄NO₄:188.09; found 188.05. Cap-63

[Note: the reaction was allowed to run forlonger than what was noted forthe generalprocedure.] ¹H NMR(DMSO-d₆, δ = 2.5 ppm,400 MHz): 12.21(br s,1H), 7.42(br s, 1H),3.50(s, 3H), 2.02-1.85(m, 4H), 1.66-1.58(m,4H).LC/MS: Anal. Calcd. for [M + H]⁺C₈H₁₄NO₄: 188.09; found 188.19. Cap-64

[Note: the reaction was allowed to run forlonger than what was noted forthe generalprocedure.] ¹H NMR(DMSO-d₆, δ = 2.5 ppm,400 MHz): 12.35(br s,1H), 7.77(s, 0.82H),7.56/7.52(overlapping br s, 0.18H), 3.50(s,3H),3.57-2.40(m, 2H), 2.14-2.07(m, 2H),1.93-1.82(m, 2H).

Methyl chloroformate (0.65 mL, 8.39 mmol) was added dropwise over 5 minto a cooled (ice-water) mixture of Na₂CO₃ (0.449 g, 4.23 mmol), NaOH(8.2 mL of 1M/H₂O, 8.2 mmol) and(s)-3-hydroxy-2-(methoxycarbonylamino)-3-methylbutanoic acid (1.04 g,7.81 mmol). The reaction mixture was stirred for 45 min, and then thecooling bath was removed and stirring was continued for an additional3.75 hr. The reaction mixture was washed with CH₂Cl₂, and the aqueousphase was cooled with ice-water bath and acidified with concentrated HClto a pH region of 1-2. The volatile component was removed in vacuo andthe residue was taken up in a 2:1 mixture of MeOH/CH₂Cl₂ (15 mL) andfiltered, and the filterate was rotervaped to afford Cap-65 as a whitesemi-viscous foam (1.236 g). ¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz): δ6.94 (d, J=8.5, 0.9 H), 6.53 (br s, 0.1H), 3.89 (d, J=8.8, 1H), 2.94 (s,3H), 1.15 (s, 3H), 1.13 (s, 3H).

Cap-66 and -67 were prepared from appropriate commercially availablestarting materials by employing the procedure described for thesynthesis of Cap-65.

¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz): δ 12.58 (br s, 1H), 7.07 (d,J=8.3, 0.13H), 6.81 (d, J=8.8, 0.67H), 4.10-4.02 (m, 1.15H), 3.91 (dd,J=9.1, 3.5, 0.85H), 3.56 (s, 3H), 1.09 (d, J=6.2, 3H). [Note: only thedominant signals of NH were noted]

¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz): 12.51 (br s, 1H), 7.25 (d, J=8.4,0.75H), 7.12 (br d, J=0.4, 0.05H), 6.86 (br s, 0.08H), 3.95-3.85 (m,2H), 3.54 (s, 3H), 1.08 (d, J=6.3, 3H). [Note: only the dominant signalsof NH were noted]

Methyl chloroformate (0.38 ml, 4.9 mmol) was added drop-wise to amixture of IN NaOH (aq) (9.0 ml, 9.0 mmol), 1M NaHCO₃ (aq) (9.0 ml, 9.0mol), L-aspartic acid β-benzyl ester (1.0 g, 4.5 mmol) and Dioxane (9ml). The reaction mixture was stirred at ambient conditions for 3 hr,and then washed with Ethyl acetate (50 ml, 3×). The aqueous layer wasacidified with 12N HCl to a pH ˜1-2, and extracted with ethyl acetate(3×50 ml). The combined organic layers were washed with brine, dried(Na₂SO₄), filtered, and concentrated in vacuo to afford Cap-68 as alight yellow oil (1.37 g; mass is above theoretical yield, and theproduct was used without further purification). ¹H NMR (DMSO-d₆, δ=2.5ppm, 500 MHz): 6 12.88 (br s, 1H), 7.55 (d, J=8.5, 1H), 7.40-7.32 (m,5H), 5.13 (d, J=12.8, 1H), 5.10 (d, J=12.9, 1H), 4.42-4.38 (m, 1H), 3.55(s, 3H), 2.87 (dd, J=16.2, 5.5, 1H), 2.71 (dd, J=16.2, 8.3, 1H). LC(Cond. 2): RT=1.90 min; LC/MS: Anal. Calcd. For [M+H]⁺ C₁₃H₁₆NO₆:282.10; found 282.12.

NaCNBH₃ (2.416 g, 36.5 mmol) was added in batches to a chilled (˜15° C.)water (17 mL)/MeOH (10 mL) solution of alanine (1.338 g, 15.0 mmol). Afew minutes later acetaldehyde (4.0 mL, 71.3 mmol) was added drop-wiseover 4 min, the cooling bath was removed, and the reaction mixture wasstirred at ambient condition for 6 hr. An additional acetaldehyde (4.0mL) was added and the reaction was stirred for 2 hr. Concentrated HClwas added slowly to the reaction mixture until the pH reached ˜1.5, andthe resulting mixture was heated for 1 hr at 40° C. Most of the volatilecomponent was removed in vacuo and the residue was purified with aDowex® 50WX8-100 ion-exchange resin (column was washed with water, andthe compound was eluted with dilute NH₄OH, prepared by mixing 18 ml ofNH₄OH and 282 ml of water) to afford Cap-69 (2.0 g)as an off-white softhygroscopic solid. ¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz): δ 3.44 (q, J=7.1, 1H), 2.99-2.90 (m, 2H), 2.89-2.80 (m, 2H), 1.23 (d, J=7.1, 3H), 1.13(t, J=7.3, 6H).

Cap-70 to -74x were prepared according to the procedure described forthe synthesis of Cap-69 by employing appropriate starting materials.

Cap-70a: (R)Cap-70b: (S)

¹H NMR(DMSO-d₆, δ = 2.5 ppm, 400 MHz):δ 3.42(q, J=7.1, 1H), 2.68-2.60(m,4H),1.53-1.44(m, 4H), 1.19(d, J=7.3, 3H), 0.85(t, J=7.5, 6H). LC/MS:Anal. Calcd. for[M + H]⁺ C₉H₂₀NO₂: 174.15; found 174.13. Cap-71a:(R)Cap-71b: (S)

¹H NMR(DMSO-d₆, δ = 2.5 ppm, 500 MHz):δ 3.18-3.14(m, 1H), 2.84-2.77(m,2H), 2.76-2.68(m, 2H), 1.69-1.54(m, 2H), 1.05(t, J=7.2, 6H), 0.91(t,J=7.3, 3H). LC/MS: Anal.Calcd. for [M + H]⁺ C₈H₁₈NO₂: 160.13;found160.06. Cap-72

¹H NMR(DMSO-d₆, δ = 2.5 ppm, 400 MHz):δ 2.77-2.66(m, 3H), 2.39-2.31(m,2H), 1.94-1.85(m, 1H), 0.98(t, J=7.1, 6H), 0.91(d, J=6.5,3H), 0.85(d,J=6.5, 3H), LC/MS: Anal.Calcd. for [M + H]⁺ C₉H₂₀NO₂: 174.15;found174.15. Cap-73

¹H NMR(DMSO-d₆, δ = 2.5 ppm, 500 MHz):δ 9.5(br s, 1H), 3.77(dd, J=10.8,4.1, 1H),3.69-3.61(m, 2H), 3.26(s, 3H), 2.99-2.88(m,4H), 1.13(t, J=7.2,6H). Cap-74

¹H NMR(DMSO-d₆, δ = 2.5 ppm, 500 MHz):δ 7.54(s, 1H), 6.89(s, 1H),3.81(t, J=6.6,k, 1H), 2.82-2.71(m, 4H), 2.63(dd, J=15.6,7.0, 1H),2.36(dd, J=15.4, 6.3, 1H), 1.09(t, J=7.2,6H). RT = 0.125 minutes (Cond.2);LC/MS: Anal. Calcd. for [M + H]⁺ C₈H₁₇N₂O₃:189.12; found 189.13.Cap-74x

LC/MS: Anal. Calcd. for [M + H]⁺ C₁₀H₂₂NO₂:188.71; found 188.21

NaBH₃CN (1.6 g, 25.5 mmol) was added to a cooled (ice/water bath) water(25 ml)/methanol (15 ml) solution of H-D-Ser-OBzl HCl (2.0 g, 8.6 mmol).Acetaldehyde (1.5 ml, 12.5 mmol) was added drop-wise over 5 min, thecooling bath was removed, and the reaction mixture was stirred atambient condition for 2 hr. The reaction was carefully quenched with 12NHCl and concentrated in vacuo. The residue was dissolved in water andpurified with a reverse phase HPLC (MeOH/H₂O/TFA) to afford the TFA saltof (R)-benzyl 2-(diethylamino)-3-hydroxypropanoate as a colorlessviscous oil (1.9 g). ¹H NMR (DMSO-d₆, δ=2.5 ppm, 500 MHz): δ 9.73 (br s,1H), 7.52-7.36 (m, 5H), 5.32 (d, J=12.2, 1H), 5.27 (d, J=12.5, 1H),4.54-4.32 (m, 1H), 4.05-3.97 (m, 2H), 3.43-3.21 (m, 4H), 1.23 (t, J=7.2,6H). LC/MS (Cond. 2): RT=1.38 min; LC/MS: Anal. Calcd. for [M+H]⁺C₁₄H₂₂NO₃: 252.16; found 252.19.

Cap-75

NaH (0.0727 g, 1.82 mmol, 60%) was added to a cooled (ice-water) THF(3.0 mL) solution of the TFA salt (R)-benzyl2-(diethylamino)-3-hydroxypropanoate (0.3019 g, 0.8264 mmol) preparedabove, and the mixture was stirred for 15 min. Methyl iodide (56 μL,0.90 mmol) was added and stirring was continued for 18 hr while allowingthe bath to thaw to ambient condition. The reaction was quenched withwater and loaded onto a MeOH pre-conditioned MCX (6 g)cartridge, andwashed with methanol followed by compound elution with 2N NH₃/Methanol.Removal of the volatile component in vacuo afforded Cap-75, contaminatedwith (R)-2-(diethylamino)-3-hydroxypropanoic acid, as a yellowsemi-solid (100 mg). The product was used as is without furtherpurification.

NaCNBH₃ (1.60 g, 24.2 mmol) was added in batches to a chilled (˜15° C.)water/MeOH (12 mL each) solution of(S)-4-amino-2-(tert-butoxycarbonylamino) butanoic acid (2.17 g, 9.94mmol). A few minutes later acetaldehyde (2.7 mL, 48.1 mmol) was addeddrop-wise over 2 min, the cooling bath was removed, and the reactionmixture was stirred at ambient condition for 3.5 hr. An additionalacetaldehyde (2.7 mL, 48.1 mmol) was added and the reaction was stirredfor 20.5 hr. Most of the MeOH component was removed in vacuo, and theremaining mixture was treated with concentrated HCl until its pH reached˜1.0 and then heated for 2 hr at 40° C. The volatile component wasremoved in vacuo, and the residue was treated with 4 M HCl/dioxane (20mL) and stirred at ambient condition for 7.5 hr. The volatile componentwas removed in vacuo and the residue was purified with Dowex® 50WX8-100ion-exchange resin (column was washed with water and the compound waseluted with dilute NH₄OH, prepared from 18 ml of NH₄OH and 282 ml ofwater) to afford intermediate (S)-2-amino-4-(diethylamino)butanoic acidas an off-white solid (1.73 g).

Methyl chloroformate (0.36 mL, 4.65 mmol) was added drop-wise over 11min to a cooled (ice-water) mixture of Na₂CO₃ (0.243 g, 2.29 mmol), NaOH(4.6 mL of 1M/H₂O, 4.6 mmol) and the above product (802.4 mg). Thereaction mixture was stirred for 55 min, and then the cooling bath wasremoved and stirring was continued for an additional 5.25 hr. Thereaction mixture was diluted with equal volume of water and washed withCH₂Cl₂ (30 mL, 2×), and the aqueous phase was cooled with ice-water bathand acidified with concentrated HCl to a pH region of 2. The volatilecomponent was then removed in vacuo and the crude material wasfree-based with MCX resin (6.0 g; column was washed with water, andsample was eluted with 2.0 M NH₃/MeOH) to afford impure Cap-76 as anoff-white solid (704 mg). ¹H NMR (MeOH-d₄, δ=3.29 ppm, 400 MHz): δ 3.99(dd, J=7.5, 4.7, 1H), 3.62 (s, 3H), 3.25-3.06 (m, 6H), 2.18-2.09 (m,1H), 2.04-1.96 (m, 1H), 1.28 (t, J=7.3, 6H). LC/MS: Anal. Calcd. for[M+H]⁺ C₁₀H₂₁N₂O₄: 233.15; found 233.24.

The synthesis of Cap-77 was conducted according to the proceduredescribed for Cap-7 by using 7-azabicyclo[2.2.1]heptane for the SN₂displacement step, and by effecting the enantiomeric separation of theintermediate benzyl 2-(7-azabicyclo[2.2.1]heptan-7-yl)-2-phenylacetateusing the following condition: the intermediate (303.7 mg) was dissolvedin ethanol, and the resulting solution was injected on a chiral HPLCcolumn (Chiracel AD-H column, 30×250 mm, 5 um) eluting with 90% CO₂-10%EtOH at 70 mL/min, and a temperature of 35° C. to provide 124.5 mg ofenantiomer-1 and 133.8 mg of enantiomer-2. These benzyl esters werehydrogenolysed according to the preparation of Cap-7 to provide Cap-77:¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz): δ 7.55 (m, 2H), 7.38-7.30 (m, 3H),4.16 (s, 1H), 3.54 (app br s, 2H), 2.08-1.88 (m, 4 H), 1.57-1.46 (m,4H). LC (Cond. 1): RT=0.67 min; LC/MS: Anal. Calcd. for [M+H]⁺C₁₄H₁₈BrNO₂: 232.13; found 232.18. HRMS: Anal. Calcd. for [M+H]⁺C₁₄H₁₈BrNO₂: 232.1338; found 232.1340.

NaCNBH₃ (0.5828 g, 9.27 mmol) was added to a mixture of the HCl salt of(R)-2-(ethylamino)-2-phenylacetic acid (an intermediate in the synthesisof Cap-3; 0.9923 mg, 4.60 mmol) and(1-ethoxycyclopropoxy)trimethylsilane (1.640 g, 9.40 mmol) in MeOH (10mL), and the semi-heterogeneous mixture was heated at 50° C. with an oilbath for 20 hr. More (1-ethoxycyclopropoxy)trimethylsilane (150 mg, 0.86mmol) and NaCNBH₃ (52 mg, 0.827 mmol) were added and the reactionmixture was heated for an additional 3.5 hr. It was then allowed to coolto ambient temperature and acidified to a ˜pH region of 2 withconcentrated HCl, and the mixture was filtered and the filtrate wasrotervaped. The resulting crude material was taken up in i-PrOH (6 mL)and heated to effect dissolution, and the non-dissolved part wasfiltered off and the filtrate concentrated in vacuo. About ⅓ of theresultant crude material was purified with a reverse phase HPLC(H₂O/MeOH/TFA) to afford the TFA salt of Cap-78 as a colorless viscousoil (353 mg). ¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz; after D₂O exchange):δ 7.56-7.49 (m, 5H), 5.35 (S, 1H), 3.35 (m, 1H), 3.06 (app br s, 1H),2.66 (m, 1H), 1.26 (t, J=7.3, 3H), 0.92 (m, 1H), 0.83-0.44 (m, 3H). LC(Cond. 1): RT=0.64 min; LC/MS: Anal. Calcd. for [M+H]⁺ C₁₃H₁₈NO₂:220.13; found 220.21. HRMS: Anal. Calcd. for [M+H]⁺ C₁₃H₁₈NO₂: 220.1338;found 220.1343.

Ozone was bubbled through a cooled (−78° C.) CH₂Cl₂ (5.0 mL) solutionCap-55 (369 mg, 2.13 mmol) for about 50 min until the reaction mixtureattained a tint of blue color. Me₂S (10 pipet drops) was added, and thereaction mixture was stirred for 35 min. The −78° C. bath was replacedwith a −10° C. bath and stirring continued for an additional 30 min, andthen the volatile component was removed in vacuo to afford a colorlessviscous oil.

NaBH₃CN (149 mg, 2.25 mmol) was added to a MeOH (5.0 mL) solution of theabove crude material and morpholine (500 μL, 5.72 mmol) and the mixturewas stirred at ambient condition for 4 hr. It was cooled to ice-watertemperature and treated with concentrated HCl to bring its pH to ˜2.0,and then stirred for 2.5 hr. The volatile component was removed invacuo, and the residue was purified with a combination of MCX resin(MeOH wash; 2.0 N NH₃/MeOH elution) and a reverse phase HPLC(H₂O/MeOH/TFA) to afford Cap-79 containing unknown amount of morpholine.

In order to consume the morpholine contaminant, the above material wasdissolved in CH₂Cl₂ (1.5 mL) and treated with Et₃N (0.27 mL, 1.94 mmol)followed by acetic anhydride (0.10 mL, 1.06 mmol) and stirred at ambientcondition for 18 hr. THF (1.0 mL) and H₂O (0.5 mL) were added andstirring continued for 1.5 hr. The volatile component was removed invacuo, and the resultant residue was passed through MCX resin (MeOHwash; 2.0 N NH₃/MeOH elution) to afford impure Cap-79 as a brown viscousoil, which was used for the next step without further purification.

SOCl₂ (6.60 mL, 90.5 mmol) was added drop-wise over 15 min to a cooled(ice-water) mixture of (S)-3-amino-4-(benzyloxy)-4-oxobutanoic acid(10.04 g, 44.98 mmol) and MeOH (300 mL), the cooling bath was removedand the reaction mixture was stirred at ambient condition for 29 hr.Most of the volatile component was removed in vacuo and the residue wascarefully partitioned between EtOAc (150 mL) and saturated NaHCO₃solution. The aqueous phase was extracted with EtOAc (150 mL, 2×), andthe combined organic phase was dried (MgSO₄), filtered, and concentratedin vacuo to afford (S)-1-benzyl 4-methyl 2-aminosuccinate as a colorlessoil (9.706g). ¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz): δ 7.40-7.32 (m, 5H),5.11 (s, 2H), 3.72 (app t, J=6.6, 1H), 3.55 (s, 3H), 2.68 (dd, J=15.9,6.3, 1H), 2.58 (dd, J=15.9, 6.8, 1H), 1.96 (s, 2H). LC (Cond. 1):RT=0.90 min; LC/MS: Anal. Calcd. for [M+H]⁺ C₁₂H₁₆NO₄: 238.11; found238.22.

Pb(NO₃)₂ (6.06 g, 18.3 mmol) was added over 1 min to a CH₂Cl₂ (80 mL)solution of (S)-1-benzyl 4-methyl 2-aminosuccinate (4.50 g, 19.0 mmol),9-bromo-9-phenyl-9H-fluorene (6.44 g, 20.0 mmol) and Et₃N (3.0 mL, 21.5mmol), and the heterogeneous mixture was stirred at ambient conditionfor 48 hr. The mixture was filtered and the filtrate was treated withMgSO₄ and filtered again, and the final filtrate was concentrated. Theresulting crude material was submitted to a Biotage purification (350 gsilica gel, CH₂Cl₂ elution) to afford (S)-1-benzyl 4-methyl2-(9-phenyl-9H-fluoren-9-ylamino)succinate as highly viscous colorlessoil (7.93 g). ¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz): δ 7.82 (m, 2H),7.39-7.13 (m, 16H), 4.71 (d, J=12.4, 1H), 4.51 (d, J=12.6, 1H), 3.78 (d,J=9.1, NH), 3.50 (s, 3H), 2.99 (m, 1H), 2.50-2.41 (m, 2H, partiallyoverlapped with solvent). LC (Cond. 1): RT=2.16 min; LC/MS: Anal. Calcd.for [M+H]¹ C₃₁H₂₈NO₄: 478.20; found 478.19.

LiHMDS (9.2 mL of 1.0 M/THF, 9.2 mmol) was added drop-wise over 10 minto a cooled (−78° C.) THF (50 mL) solution of (S)-1-benzyl 4-methyl2-(9-phenyl-9H-fluoren-9-ylamino)succinate (3.907 g, 8.18 mmol) andstirred for ˜1 hr. MeI (0.57 mL, 9.2 mmol) was added drop-wise over 8min to the mixture, and stirring was continued for 16.5 hr whileallowing the cooling bath to thaw to room temperature. After quenchingwith saturated NH₄Cl solution (5 mL), most of the organic component wasremoved in vacuo and the residue was partitioned between CH₂Cl₂ (100 mL)and water (40 mL). The organic layer was dried (MgSO₄), filtered, andconcentrated in vacuo, and the resulting crude material was purifiedwith a Biotage (350 g silica gel; 25% EtOAc/hexanes) to afford 3.65 g ofa 2S/3S and 2S/3R diastereomeric mixtures of 1-benzyl 4-methyl3-methyl-2-(9-phenyl-9H-fluoren-9-ylamino)succinate in ˜1.0:0.65 ratio(¹H NMR). The stereochemistry of the dominant isomer was not determinedat this juncture, and the mixture was submitted to the next step withoutseparation. Partial ¹H NMR data (DMSO-d₆, δ=2.5 ppm, 400 MHz): majordiastereomer, δ 4.39 (d, J=12.3, 1H of CH₂), 3.33 (s, 3H, overlappedwith H₂O signal), 3.50 (d, J=10.9, NH), 1.13 (d, J=7.1, 3H); minordiastereomer, δ 4.27 (d, J=12.3, 1H of CH₂), 3.76 (d, J=10.9, NH), 3.64(s, 3H), 0.77 (d, J=7.0, 3H). LC (Cond. 1): RT=2.19 min; LC/MS: Anal.Calcd. for [M+H]⁺ C₃₂H₃₀NO₄: 492.22; found 492.15.

Diisobutylaluminum hydride (20.57 ml of 1.0 M in hexanes, 20.57 mmol)was added drop-wise over 10 min to a cooled (−78° C.) THF (120 mL)solution of (2S)-1-benzyl 4-methyl3-methyl-2-(9-phenyl-9H-fluoren-9-ylamino)succinate (3.37 g, 6.86 mmol)prepared above, and stirred at −78° C. for 20 hr. The reaction mixturewas removed from the cooling bath and rapidly poured into ˜1M H₃PO₄/H₂O(250 mL) with stirring, and the mixture was extracted with ether (100mL, 2×). The combined organic phase was washed with brine, dried(MgSO₄), filtered and concentrated in vacuo. A silica gel mesh of thecrude material was prepared and submitted to chromatography (25%EtOAc/hexanes; gravity elution) to afford 1.1 g of (2 S,3 S)-benzyl4-hydroxy-3-methyl-2-(9-phenyl-9H-fluoren-9-ylamino)butanoate,contaminated with benzyl alcohol, as a colorless viscous oil and(2S,3R)-benzyl4-hydroxy-3-methyl-2-(9-phenyl-9H-fluoren-9-ylamino)butanoate containingthe (2S,3R) stereoisomer as an impurity. The later sample wasresubmitted to the same column chromatography purification conditions toafford 750 mg of purified material as a white foam. [Note: the (2S, 3S)isomer elutes before the (2S,3R) isomer under the above condition]. (2S,3S) isomer: ¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz): 7.81 (m, 2H),7.39-7.08 (m, 16H), 4.67 (d, J=12.3, 1H), 4.43 (d, J=12.4, 1H), 4.21(app t, J=5.2, OH), 3.22 (d, J=10.1, NH), 3.17 (m, 1H), 3.08 (m, 1H),˜2.5 (m, 1H, overlapped with the solvent signal), 1.58 (m, 1H), 0.88 (d,J=6.8, 3H). LC (Cond. 1): RT=2.00 min; LC/MS: Anal. Calcd. for [M+H]⁺C₃₁H₃₀NO₃: 464.45; found 464.22. (2S, 3R) isomer: ¹H NMR (DMSO-d₆, δ=2.5ppm, 400 MHz): 7.81 (d, J=7.5, 2H), 7.39-7.10 (m, 16H), 4.63 (d, J=12.1,1H), 4.50 (app t, J=4.9, 1H), 4.32 (d, J=12.1, 1H), 3.59-3.53 (m, 2H),3.23 (m, 1H), 2.44 (dd, J=9.0, 8.3, 1H), 1.70 (m, 1H), 0.57 (d, J=6.8,3H). LC (Cond. 1): RT=1.92 min; LC/MS: Anal. Calcd. for [M+H]⁺C₃₁H₃₀NO₃: 464.45; found 464.52.

The relative stereochemical assignments of the DIBAL-reduction productswere made based on NOE studies conducted on lactone derivatives preparedfrom each isomer by employing the following protocol: LiHMDS (50 μL of1.0 M/THF, 0.05 mmol) was added to a cooled (ice-water) THF (2.0 mL)solution of(2S,3S)-benzyl-4-hydroxy-3-methyl-2-(9-phenyl-9H-fluoren-9-ylamino)butanoate(62.7 mg, 0.135 mmol), and the reaction mixture was stirred at similartemperature for ˜2 hr. The volatile component was removed in vacuo andthe residue was partitioned between CH₂Cl₂ (30 mL), water (20 mL) andsaturated aqueous NH4Cl solution (1 mL). The organic layer was dried(MgSO₄), filtered, and concentrated in vacuo, and the resulting crudematerial was submitted to a Biotage purification (40 g silica gel;10-15% EtOAc/hexanes) to afford(3S,4S)-4-methyl-3-(9-phenyl-9H-fluoren-9-ylamino)dihydrofuran-2(3H)-oneas a colorless film of solid (28.1 mg).(2S,3R)-benzyl-4-hydroxy-3-methyl-2-(9-phenyl-9H-fluoren-9-ylamino)butanoatewas elaborated similarly to(3S,4R)-4-methyl-3-(9-phenyl-9H-fluoren-9-ylamino)dihydrofuran-2(3H)-one.(3S,4S)-lactone isomer: ¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz), 7.83 (d,J=7.5, 2H), 7.46-7.17 (m, 11H), 4.14 (app t, J=8.3, 1H), 3.60 (d, J=5.8,NH), 3.45 (app t, J=9.2, 1H), ˜2.47 (m, 1H, partially overlapped withsolvent signal), 2.16 (m, 1H), 0.27 (d, J=6.6, 3H). LC (Cond. 1):RT=1.98 min; LC/MS: Anal. Calcd. for [M+Na]⁺ C₂₄H₂₁NNaO₂: 378.15; found378.42. (3S,4R)-lactone isomer: ¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz),7.89 (d, J=7.6, 1H), 7.85 (d, J=7.3, 1H), 7.46-7.20 (m, 1 1H), 3.95 (dd,J=9.1, 4.8, 1H), 3.76 (d, J=8.8, 1H), 2.96 (d, J=3.0, NH), 2.92 (dd,J=6.8, 3, NCH), 1.55 (m, 1H), 0.97 (d, J=7.0, 3H). LC (Cond. 1): RT=2.03min; LC/MS: Anal. Calcd. for [M+Na]⁺ C₂₄H₂₁NNaO₂: 378.15; found 378.49.

TBDMS-Cl (48 mg, 0.312 mmol) followed by imidazole (28.8 mg, 0.423 mmol)were added to a CH₂Cl₂ (3 ml) solution of (2S,3S)-benzyl4-hydroxy-3-methyl-2-(9-phenyl-9H-fluoren-9-ylamino)butanoate (119.5 mg,0.258 mmol), and the mixture was stirred at ambient condition for 14.25hr. The reaction mixture was then diluted with CH₂Cl₂ (30 mL) and washedwith water (15 mL), and the organic layer was dried (MgSO4), filtered,and concentrated in vacuo. The resultant crude material was purifiedwith a Biotage (40 g silica gel; 5% EtOAc/hexanes) to afford(2S,3S)-benzyl4-(tert-butyldimethylsilyloxy)-3-methyl-2-(9-phenyl-9H-fluoren-9-ylamino)butanoate,contaminated with TBDMS based impurities, as a colorless viscous oil(124.4 mg). (2S,3R)-benzyl4-hydroxy-3-methyl-2-(9-phenyl-9H-fluoren-9-ylamino)butanoate waselaborated similarly to (2S,3R)-benzyl4-(tert-butyldimethylsilyloxy)-3-methyl-2-(9-phenyl-9H-fluoren-9-ylamino)butanoate.(2S,3S)-silyl ether isomer: ¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz), 7.82(d, J=4.1, 1H), 7.80 (d, J=4.0, 1H), 7.38-7.07 (m, 16 H), 4.70 (d,J=12.4, 1H), 4.42 (d, J=12.3, 1H), 3.28-3.19 (m, 3H), 2.56 (dd, J=10.1,5.5, 1H), 1.61 (m, 1H), 0.90 (d, J=6.8, 3H), 0.70 (s, 9H), −0.13 (s,3H), −0.16 (s, 3H). LC (Cond. 1, where the run time was extended to 4min): RT=3.26 min; LC/MS: Anal. Calcd. for [M+H] C₃₇H₄₄NO₃Si: 578.3 1;found 578.40. (2S,3R)-silyl ether isomer: ¹H NMR (DMSO-d₆, δ=2.5 ppm,400 MHz), 7.82 (d, J=3.0, 1H), 7.80 (d, J=3.1, 1H), 7.39-7.10 (m, 16H),4.66 (d, J=12.4, 1H), 4.39 (d, J=12.4, 1H), 3.61 (dd, J=9.9, 5.6, 1H),3.45 (d, J=9.5, 1H), 3.41 (dd, J=10, 6.2, 1H), 2.55 (dd, J=9.5, 7.3,1H), 1.74 (m, 1H), 0.77 (s, 9H), 0.61 (d, J=7.1, 3H), −0.06 (s, 3H),−0.08 (s, 3H).

A balloon of hydrogen was attached to a mixture of (2S,3S)-benzyl4-(tert-butyldimethylsilyloxy)-3-methyl-2-(9-phenyl-9H-fluoren-9-ylamino)butanoate(836 mg, 1.447 mmol) and 10% Pd/C (213 mg) in EtOAc (16 mL) and themixture was stirred at room temperature for ˜21 hr, where the balloonwas recharged with H₂ as necessary. The reaction mixture was dilutedwith CH₂Cl₂ and filtered through a pad of diatomaceous earth(Celite-545®), and the pad was washed with EtOAc (200 mL), EtOAc/MeOH(1:1 mixture, 200 mL) and MeOH (750 mL). The combined organic phase wasconcentrated, and a silica gel mesh was prepared from the resultingcrude material and submitted to a flash chromatography (8:2:1 mixture ofEtOAc/i-PrOH/H₂O) to afford(2S,3S)-2-amino-4-(tert-butyldimethylsilyloxy)-3-methylbutanoic acid asa white fluffy solid (325 mg). (2S,3R)-benzyl4-(tert-butyldimethylsilyloxy)-3-methyl-2-(9-phenyl-9H-fluoren-9-ylamino)butanoatewas similarly elaborated to(2S,3R)-2-amino-4-(tert-butyldimethylsilyloxy)-3-methylbutanoic acid.(2S,3S)-amino acid isomer: ¹H NMR (Methanol-d₄, δ=3.29 ppm, 400 MHz),3.76 (dd, J=10.5, 5.2, 1H), 3.73 (d, J=3.0, 1H), 3.67 (dd, J=10.5, 7.0,H), 2.37 (m, 1H), 0.97 (d, J=7.0, 3H), 0.92 (s, 9H), 0.10 (s, 6H).LC/MS: Anal. Calcd. for [M+H]⁺ C₁₁H₂₆NO₃Si: 248.17; found 248.44.(2S,3R)-amino acid isomer: ¹H NMR (Methanol-d₄, δ=3.29 ppm, 400 MHz),3.76-3.75 (m, 2H), 3.60 (d, J=4.1, 1H), 2.16 (m, 1H), 1.06 (d, J=7.3,3H), 0.91 (s, 9H), 0.09 (s, 6H). Anal. Calcd. for [M+H]⁺ C₁₁H₂₆NO₃Si:248.17; found 248.44.

Water (1 mL) and NaOH (0. 18 mL of 1.0 M/H₂O, 0.18 mmol) were added to amixture of(2S,3S)-2-amino-4-(tert-butyldimethylsilyloxy)-3-methylbutanoic acid(41.9 mg, 0.169 mmol) and Na₂CO₃ (11.9 mg, 0.112 mmol), and sonicatedfor about 1 min to effect dissolution of reactants. The mixture was thencooled with an ice-water bath, methyl chloroformate (0.02 mL, 0.259mmol) was added over 30 s, and vigorous stirring was continued atsimilar temperature for 40 min and then at ambient temperature for 2.7hr. The reaction mixture was diluted with water (5 mL), cooled withice-water bath and treated drop-wise with 1.0 N HCl aqueous solution(˜0.23 mL). The mixture was further diluted with water (10 mL) andextracted with CH₂Cl₂ (15 mL, 2×). The combined organic phase was dried(MgSO₄), filtered, and concentrated in vacuo to afford Cap-80a as anoff-white solid.(2S,3R)-2-amino-4-(tert-butyldimethylsilyloxy)-3-methylbutanoic acid wassimilarly elaborated to Cap-80b. Cap-80a: ¹H NMR (DMSO-d₆, δ=2.5 ppm,400 MHz), 12.57 (br s, 1H), 7.64 (d, J=8.3, 0.3H), 7.19 (d, J=8.8,0.7H), 4.44 (dd, J=8.1, 4.6, 0.3H), 4.23 (dd, J=8.7, 4.4, 0.7H),3.56/3.53 (two singlets, 3H), 3.48-3.40 (m, 2H), 2.22-2.10 (m, 1H), 0.85(s, 9H), ˜0.84 (d, 0.9H, overlapped with t-Bu signal), 0.79 (d, J=7,2.1H), 0.02/0.01/0.00 (three overlapping singlets, 6H). LC/MS: Anal.Calcd. for [M+Na]⁺ C₁₃H₂₇NNaO₅Si: 328.16; found 328.46. Cap-80b: ¹H NMR(CDCl₃, δ=7.24 ppm, 400 MHz), 6.00 (br d, J=6.8, 1H), 4.36 (dd, J=7.1,3.1, 1H), 3.87 (dd, J=10.5, 3.0, 1H), 3.67 (s, 3H), 3.58 (dd, J=10.6,4.8, 1H), 2.35 (m, 1H), 1.03 (d, J=7.1, 3H), 0.90 (s, 9H), 0.08 (s, 6H).LC/MS: Anal. Calcd. for [M+Na]⁺ C₁₃H₂₇NNaO₅Si: 328.16; found 328.53. Thecrude products were utilized without further purification.

Prepared According to the Protocol Described by Falb et al. SyntheticCommunications 1993, 23, 2839.

Cap-82 to Cap-85

Cap-82 to Cap-85 were synthesized from appropriate starting materialsaccording to the procedure described for Cap-51. The samples exhibitedsimilar spectral profiles as that of their enantiomers (i.e., Cap-4,Cap-13, Cap-51 and Cap-52, respectively)

To a mixture of O-methyl-L-threonine (3.0 g, 22.55 mmol), NaOH (0.902 g,22.55 mmol) in H₂O (15 mL) was added ClCO₂Me (1.74 mL, 22.55 mmol)dropwise at 0C. The mixture was allowed to stir for 12 h and acidifiedto pH 1 using 1N HCl. The aqueous phase was extracted with EtOAc and(2×250 mL) and 10% MeOH in CH₂Cl₂ (250 mL) and the combined organicphases were concentrated under in vacuo to afford a colorless oil (4.18g, 97%) which was of sufficient purity for use in subsequent steps.¹HNMR (400 MHz, CDCl₃) δ 4.19 (s, 1H), 3.92-3.97 (m, 1H), 3.66 (s, 3H),1.17 (d, J=7.7 Hz, 3H). LCMS: Anal. Calcd. for C₇H₁₃NO₅: 191; found: 190(M−H)⁻.

To a mixture of L-homoserine (2.0 g, 9.79 mmol), Na₂CO₃ (2.08 g, 19.59mmol) in H₂O (15 mL) was added ClCO₂Me (0.76 mL, 9.79 mmol) dropwise at0° C. The mixture was allowed to stir for 48 h and acidified to pH 1using 1N HCl. The aqueous phase was extracted with EtOAc and (2×250 mL)and the combined organic phases were concentrated under in vacuo toafford a colorless solid (0.719 g, 28%) which was of sufficient purityfor use in subsequent steps. ¹HNMR (400 MHz, CDCl₃) δ 4.23 (dd, J=4.5,9.1 Hz, 1H), 3.66 (s, 3H), 3.43-3.49 (m, 2H), 2.08-2.14 (m, 1H),1.82-1.89 (m, 1H). LCMS: Anal. Calcd. for C₇H₁₃NO₅: 191; found: 192(M+H)⁺.

A mixture of L-valine (1.0 g, 8.54 mmol), 3-bromopyridine (1.8 mL, 18.7mmol), K₂CO₃ (2.45 g, 17.7 mmol) and CuI (169 mg, 0.887 mmol) in DMSO(10 mL) was heated at 100° C. for 12 h. The reaction mixture was cooledto rt, poured into H₂O (ca. 150 mL) and washed with EtOAc (×2). Theorganic layers were extracted with a small amount of H₂O and thecombined aq phases were acidified to ca. pH 2 with 6N HCl. The volumewas reduced to about one-third and 20 g of cation exchange resin(Strata) was added. The slurry was allowed to stand for 20 min andloaded onto a pad of cation exchange resin (Strata) (ca. 25 g). The padwas washed with H₂O (200 mL), MeOH (200 mL), and then NH₃ (3M in MeOH,2×200 mL). The appropriate fractions was concentrated in vacuo and theresidue (ca. 1.1 g)was dissolved in H₂O, frozen and lyophyllized. Thetitle compound was obtained as a foam (1.02 g, 62%). ¹HNMR (400 MHz,DMSO-d₆) δ 8.00 (s, br, 1H), 7.68-7.71 (m, 1H), 7.01 (s, br, 1H), 6.88(d, J=7.5 Hz, 1H), 5.75 (s, br, 1H), 3.54 (s, 1H), 2.04-2.06 (m, 1H),0.95 (d, J=6.0 Hz, 3H), 0.91 (d, J=6.6 Hz, 3H). LCMS: Anal. Calcd. forC₁₀H₁₄N₂O₂: 194; found: 195 (M+H)⁺.

A mixture of L-valine (1.0 g, 8.54 mmol), 5-bromopyrimidine (4.03 g,17.0 mmol), K₂CO₃ (2.40 g, 17.4 mmol) and CuI (179 mg, 0.94 mmol) inDMSO (10 mL) was heated at 100° C. for 12 h. The reaction mixture wascooled to RT, poured into H₂O (ca. 150 mL) and washed with EtOAc (×2).The organic layers were extracted with a small amount of H₂O and thecombined aq phases were acidified to ca. pH 2 with 6N HCl. The volumewas reduced to about one-third and 20 g of cation exchange resin(Strata) was added. The slurry was allowed to stand for 20 min andloaded onto a pad of cation exchange resin (Strata) (ca. 25 g). The padwas washed with H₂O (200 mL), MeOH (200 mL), and then NH₃ (3M in MeOH,2×200 mL). The appropriate fractions was concentrated in vacuo and theresidue (ca. 1.1 g)was dissolved in H₂O, frozen and lyophyllized. Thetitle compound was obtained as a foam (1.02 g, 62%). ¹HNMR (400 MHz,CD₃OD) showed the mixture to contain valine and the purity could not beestimated. The material was used as is in subsequent reactions. LCMS:Anal. Calcd. for C₉H₁₃N₃O₂: 195; found: 196 (M+H)⁺.

Cap-90 was prepared according to the method described for thepreparation of Cap-1. The crude material was used as is in subsequentsteps. LCMS: Anal. Calcd. for C₁₁H₁₅NO₂: 193; found: 192 (M−H)⁻.

The following caps were prepared according to the method of Cap-51:

Cap Structure LCMS Cap-91

LCMS: Anal. Calcd. forC₁₁H₁₃NO₄: 223;found: 222(M − H)⁻. Cap-92

LCMS: Anal. Calcd. forC₁₁H₁₃NO₄: 223;found: 222(M − H)⁻. Cap-93

LCMS: Anal. Calcd. forC₁₀H₁₂N₂O₄: 224;found: 225(M + H)⁺. Cap-94

LCMS: Anal. Calcd. forC₈H₁₁N₃O₄: 213;found: 214(M + H)⁺. Cap-95

LCMS: Anal. Calcd. forC₁₃H₁₇NO₄: 251;found: 250(M − H)⁻. Cap-96

LCMS: Anal. Calcd. forC₁₂H₁₅NO₄: 237;found: 236(M − H)⁻. Cap-97

LCMS: Anal. Calcd. forC₉H₁₅NO₄: 201;found: 200(M − H)⁻. Cap-98

LCMS: Anal. Calcd. forC₉H₁₅NO₄: 201;found: 202(M + H)⁺. Cap-99

¹HNMR(400 MHz,CD₃OD)δ 3.88-3.94(m,1H), 3.60,3.61(s, 3H),2.80(m,1H),2.20(m, 1H),1.82-1.94(m,3H), 1.45-1.71(m, 2H). Cap-99a

¹HNMR(400 MHz,CD₃OD)δ 3.88-3.94(m,1H), 3.60,3.61(s, 3H),2.80(m,1H),2.20(m, 1H),1.82-1.94(m,3H), 1.45-1.71(m, 2H). Cap-100

LCMS: Anal. Calcd. forC₁₂H₁₄NO₄F:255; found:256(M + H)⁺. Cap-101

LCMS: Anal. Calcd. forC₁₁H₁₃NO₄: 223;found: 222(M − H)⁻. Cap-102

LCMS: Anal. Calcd. forC₁₁H₁₃NO₄: 223;found: 222(M − H)⁻ Cap-103

LCMS: Anal. Calcd. forC₁₀H₁₂N₂O₄:224; found: 225(M + H)⁺. Cap-104

¹HNMR(400 MHz,CD₃OD)δ 3.60(s, 3H), 3.50-3.53(m, 1H), 2.66-2.69and2.44-2.49(m, 1H), 1.91-2.01(m, 2H),1.62-1.74(m, 4H),1.51-1.62(m, 2H).Cap-105

¹HNMR(400 MHz,CD₃OD)δ 3.60(s, 3H), 3.33-3.35(m, 1H,partially obscuredbysolvent), 2.37-2.41 and2.16-2.23(m, 1H), 1.94-2.01(m,4H),1.43-1.53(m,2H), 1.17-1.29(m, 2H).Cap-106(pre-paredfollow-ingtheproce-durede-scribedforCap-2)

¹HNMR(400 MHz,CD₃OD)δ 3.16(q, J=7.3Hz, 4H),2.38-2.41(m, 1H),2.28-2.31(m, 2H),1.79-1.89(m,2H), 1.74(app,ddd J=3.5,12.5,15.9Hz,2H),1.46(appdt, J=4.0,12.9Hz, 2H), 1.26(t, J=7.3Hz, 6H). Cap-107

LCMS: Anal. Calcd. forC₈H₁₀N₂O₄S:230; found:231 (M + H)⁺. Cap-108

LCMS: Anal. Calcd. forC₁₅H₁₇N₃O₄:303; found: 304(M + H)⁺. Cap-109

LCMS: Anal. Calcd. forC₁₀H₁₂N₂O₄:224; found: 225(M + H)⁺. Cap-110

LCMS: Anal. Calcd. forC₁₀H₁₂N₂O₄: 224;found: 225(M + H)⁺. Cap-111

LCMS: Anal. Calcd. forC₁₂H₁₆NO₈P: 333;found: 334 (M + H)⁺. Cap-112

LCMS: Anal. Calcd. forC₁₃H₁₄N₂O₄: 262;found: 263(M + H)⁺. Cap-113

LCMS: Anal. Calcd. forC₁₈H₁₉NO₅: 329;found: 330(M + H)⁺. Cap-114

¹HNMR(400 MHz,CDCl₃)δ 4.82-4.84(m,1H), 4.00-4.05(m, 2H),3.77(s,3H),2.56(s, br, 2H) Cap-115

¹HNMR(400 MHz,CDCl₃)δ 5.13(s, br, 1H), 4.13(s,br, 1H), 3.69(s,3H),2.61(d,J=5.0Hz, 2H), 1.28(d, J=9.1Hz, 3H). Cap-116

¹HNMR(400 MHz,CDCl₃)δ 5.10(d, J=8.6Hz, 1H),3.74-3.83(m,1H), 3.69(s,3H),2.54-2.61(m, 2H),1.88(sept, J=7.0Hz, 1H),0.95(d, J=7.0Hz, 6H).

Cap-117to Cap-123

For the preparation of caps Cap-117 to Cap-123 the the Boc amino acidswere commercially available and were deprotected by treatment with 25%TFA in CH₂Cl₂. After complete reaction as judged by LCMS the solventswere removed in vacuo and the corresponding TFA salt of the amino acidwas carbamoylated with methyl chloroformate according to the procedurefor Cap-51.

Cap Structure LCMS Cap-117

LCMS: Anal. Calcd. forC₁₂H₁₅NO₄S: 237; found:238 (M + H)⁺. Cap-118

LCMS: Anal. Calcd. forC₁₀H₁₃NO₄S: 243; found:244 (M + H)⁺. Cap-119

LCMS: Anal. Calcd. forC₁₀H₁₃NO₄S: 243; found:244 (M + H)⁺. Cap-120

LCMS: Anal. Calcd. forC₁₀H₁₃NO₄S: 243; found:244 (M + H)⁺. Cap-121

¹HNMR(400 MHz,CDCl₃) δ 4.06-4.16(m,1H), 3.63(s, 3H), 3.43(s,1H), 2.82and 2.66(s, br,1H), 1.86-2.10(m, 3H),1.64-1.76(m, 2H), 1.44-1.53(m, 1H).Cap-122

¹HNMR(400 MHz,CDCl₃) δ 5.28 and 5.12(s, br, 1H), 3.66(s,3H),2.64-2.74(m, 1H), 1.86-2.12(m, 3H), 1.67-1.74(m, 2H), 1.39-1.54(m,1H). Cap-123

LCMS: Anal. Calcd. forC₂₇H₂₆N₂O₆: 474; found:475 (M + H)⁺.

Preparation of Cap-124. (4S,5R)-5-methyl-2-oxooxazolidine-4-carboxylicacid

The hydrochloride salt of L-threonine tert-butyl ester was carbamoylatedaccording to the procedure for Cap-51. The crude reaction mixture wasacidified with 1N HCl to pH˜1 and the mixture was extracted with EtOAc(2×50 mL). The combined organic phases were concentrated in vacuo togive a colorless which solidified on standing. The aqueous layer wasconcentrated in vacuo and the resulting mixture of product and inorganicsalts was triturated with EtOAc-CH₂Cl₂-MeOH (1:1:0.1) and then theorganic phase concentrated in vacuo to give a colorless oil which wasshown by LCMS to be the desired product. Both crops were combined togive 0.52 g of a solid. ¹HNMR (400 MHz, CD₃OD) δ 4.60 (m, 1H), 4.04 (d,J=5.0 Hz, 1H), 1.49 (d, J=6.3 Hz, 3H). LCMS: Anal. Calcd. for C₅H₇NO₄:145; found: 146 (M+H)⁺.

Preparation of Cap-125.(S)-2-(tert-butoxycarbonylamino)-4-(dimethylamino)butanoic acid

Cap-125 was prepared according to the procedure for the preparation ofCap-1. The crude product was used as is in subsequent reactions. LCMS:Anal. Calcd. for C₁₁H₂₂N₂O₄: 246; found: 247 (M+H)⁺.

Preparation of(S)-2-(methoxycarbonylamino)-3-(1-methyl-1H-imidazol-2-yl)propanoic acid(Cap-126)

This procedure is a modification of that used to prepare Cap-51. To asuspension of (S)-2-amino-3-(1-methyl-1H-imidazol-2-yl)propanoic acid(0.80 g, 4.70 mmol) in THF (10 mL) and H₂O (10 mL) at 0° C. was addedNaHCO₃ (0.88 g, 10.5 mmol). The resulting mixture was treated withClCO₂Me (0.40 mL, 5.20 mmol) and the mixture allowed to stir at 0° C.After stirring for ca. 2 h LCMS showed no starting material remaining.The reaction was acidified to pH 2 with 6 N HCl.

The solvents were removed in vacuo and the residue was suspended in 20mL of 20% MeOH in CH₂Cl₂. The mixture was filtered and concentrated togive a light yellow foam (1.21 g,). LCMS and ¹H NMR showed the materialto be a 9:1 mixture of the methyl ester and the desired product. Thismaterial was taken up in THF (10 mL) and H₂O (10 mL), cooled to 0° C.and LiOH (249.1 mg, 10.4 mmol) was added. After stirring ca. 1 h LCMSshowed no ester remaining. Therefore the mixture was acidified with 6NHCl and the solvents removed in vacuo. LCMS and ¹H NMR confirm theabsence of the ester. The title compound was obtained as its HCl saltcontaminated with inorganic salts (1.91 g, >100%). The compound was usedas is in subsequent steps without further purification.

¹H NMR (400 MHz, CH₃OD) δ 8.84, (s, 1H), 7.35 (s, 1H), 4.52 (dd, J=5.0,9.1 Hz, 1H), 3.89 (s, 3H), 3.62 (s, 3H), 3.35 (dd, J=4.5, 15.6 Hz, 1H,partially obscured by solvent), 3.12 (dd, J=9.0, 15.6 Hz, 1H).

LCMS: Anal. Calcd. for C₁₇H₁₅NO₂: 392; found: 393 (M+H)⁺.

Preparation of(S)-2-(methoxycarbonylamino)-3-(1-methyl-1H-imidazol-4-yl)propanoic acid(Cap-127)

Cap-127 was prepared according to the method for Cap-126 above startingfrom (S)-2-amino-3-(1-methyl-1H-imidazol-4-yl)propanoic acid (1.11 g,6.56 mmol), NaHCO₃ (1.21 g, 14.4 mmol) and ClCO₂Me (0.56 mL, 7.28 mmol).The title compound was obtained as its HCl salt (1.79 g, >100%)contaminated with inorganic salts. LCMS and ¹H NMR showed the presenceof ca. 5% of the methyl ester. The crude mixture was used as is withoutfurther purification.

¹HNMR (400 MHz, CH₃OD) δ 8.90 (s, 1H), 7.35 (s, 1H), 4.48 (dd, J=5.0,8.6 Hz, 1H), 3.89 (s, 3H), 3.62 (s, 3H), 3.35 (m, 1H), 3.08 (m, 1H).

LCMS: Anal. Calcd. for C₁₇H₁₅NO₂: 392; found: 393 (M+H)⁺.

Preparation of(S)-2-(methoxycarbonylamino)-3-(1H-1,2,3-triazol-4-yl)propanoic acid(Cap-128)

Step 1. Preparation of (S)-benzyl2-(tert-butoxycarbonylamino)pent-4-ynoate (cj-27b)

To a solution of cj-27a (1.01 g, 4.74 mmol), DMAP (58 mg, 0.475 mmol)and iPr₂NEt (1.7 mL, 9.8 mmol) in CH₂Cl₂ (100 mL) at 0° C. was addedCbz-Cl (0.68 mL, 4.83 mmol). The solution was allowed to stir for 4 h at0° C., washed (1N KHSO₄, brine), dried (Na₂SO₄), filtered, andconcentrated in vacuo. The residue was purified by flash columnchromatography (TLC 6:1 hex:EtOAc) to give the title compound (1.30 g,91%) as a colorless oil. ¹HNMR (400 MHz, CDCl₃) δ 7.35 (s, 5H), 5.35 (d,br, J=8.1 Hz, 1H), 5.23 (d, J=12.2 Hz, 1H), 5.17 (d, J=12.2 Hz, 1H),4.48-4.53 (m, 1H), 2.68-2.81 (m, 2H), 2.00 (t, J=2.5 Hz, 1H), 1.44 (s,9H). LCMS: Anal. Calcd. for C₁₇H₂₁NO₄: 303; found: 304 (M+H)⁺.

Step 2. Preparation of (S)-benzyl3-(1-benzyl-1H-1,2,3-triazol-4-yl)-2-(tert-butoxycarbonylamino)propanoate(cj-28)

To a mixture of (S)-benzyl 2-(tert-butoxycarbonylamino)pent-4-ynoate(0.50 g, 1.65 mmol), sodium ascorbate (0.036 g, 0.18 mmol), CuSO₄-5H₂O(0.022 g, 0.09 mmol) and NaN₃ (0.13 g, 2.1 mmol) in DMF-H₂O (5 mL, 4:1)at rt was added BnBr (0.24 mL, 2.02 mmol) and the mixture was warmed to65° C. After 5 h LCMS indicated low conversion. A further portion ofNaN₃ (100 mg) was added and heating was continued for 12 h. The reactionwas poured into EtOAc and H₂O and shaken. The layers were separated andthe aqueous layer extracted 3× with EtOAc and the combined organicphases washed (H₂O×3, brine), dried (Na₂SO₄), filtered, andconcentrated. The residue was purified by flash (Biotage, 40+M 0-5% MeOHin CH₂Cl₂; TLC 3% MeOH in CH₂Cl₂) to afford a light yellow oil whichsolidified on standing (748.3 mg, 104%). The NMR was consistent with thedesired product but suggests the presence of DMF. The material was usedas is without further purification. ¹HNMR (400 MHz, DMSO-d₆) δ 7.84 (s,1H), 7.27-7.32 (m, 10H), 5.54 (s, 2H), 5.07 (s, 2H), 4.25 (m, 1H), 3.16(dd, J=1.0, 5.3 Hz, 1H), 3.06 (dd, J=5.3, 14.7 Hz), 2.96 (dd, J=9.1,14.7 Hz, 1H), 1.31 (s, 9H).

LCMS: Anal. Calcd. for C₂₄H₂₈N₄O₄: 436; found: 437 (M+H)⁺.

Step 2. Preparation of (S)-benzyl3-(1-benzyl-1H-1,2,3-triazol-4-yl)-2-(methoxycarbonylamino)propanoate(cj-29)

A solution of (S)-benzyl3-(1-benzyl-1H-1,2,3-triazol-4-yl)-2-(tert-butoxycarbonylamino)propanoate(0.52 g, 1.15 mmol) in CH₂Cl₂ was added TFA (4 mL). The mixture wasallowed to stir at room temperature for 2 h. The mixture wasconcentrated in vacuo to give a colorless oil which solidified onstanding. This material was dissolved in THF—H₂O and cooled to 0° C.Solid NaHCO₃ (0.25 g, 3.00 mmol) was added followed by ClCO₂Me (0.25 mL,3.25 mmol). After stirring for 1.5 h the mixture was acidified to pH˜2with 6N HCl and then poured into H₂O-EtOAc. The layers were separatedand the aq phase extracted 2× with EtOAc. The combined org layers werewashed (H₂O, brine), dried (Na₂SO₄), filtered, and concentrated in vacuoto give a colorless oil (505.8 mg, 111%, NMR suggested the presence ofan unidentified impurity) which solidified while standing on the pump.The material was used as is without further purification. ¹HNMR (400MHz, DMSO-d₆) δ 7.87 (s, 1H), 7.70 (d, J=8.1 Hz, 1H), 7.27-7.32 (m,10H), 5.54 (s, 2H), 5.10 (d, J=12.7 Hz, 1H), 5.06 (d, J=12.7 Hz, 1H),4.32-4.37 (m, 1H), 3.49 (s, 3H), 3.09 (dd, J=5.6, 14.7 Hz, 1H), 2.98(dd, J=9.6, 14.7 Hz, 1H). LCMS: Anal. Calcd. for C₂₁H₂₂N₄O₄: 394; found:395 (M+H)⁺.

Step 3. Preparation of(S)-2-(methoxycarbonylamino)-3-(1H-1,2,3-triazol-4-yl)propanoic acid(Cap-128)

(S)-benzyl3-(1-benzyl-1H-1,2,3-triazol-4-yl)-2-(methoxycarbonylamino)propanoate(502 mg, 1.11 mmol) was hydrogenated in the presence of Pd—C (82 mg) inMeOH (5 mL) at atmospheric pressure for 12 h. The mixture was filteredthrough diatomaceous earth (Celite®) and concentrated in vacuo.(S)-2-(methoxycarbonylamino)-3-(1H-1,2,3-triazol-4-yl)propanoic acid wasobtained as a colorless gum (266 mg, 111%) which was contaminated withca. 10% of the methyl ester. The material was used as is without furtherpurification.

¹HNMR (400 MHz, DMSO-d₆) δ 12.78 (s, br, 1H), 7.59 9s, 1H), 7.50 (d,J=8.0 Hz, 1H), 4.19-4.24 (m, 1H), 3.49 (s, 3H), 3.12 (dd, J=4.8 Hz, 14.9Hz, 1H), 2.96 (dd, J=9.9, 15.0 Hz, 1H). LCMS: Anal. Calcd. forC₇H₁₀N₄O₄: 214; found: 215 (M+H)⁺.

Preparation of (S)-2-(methoxycarbonylamino)-3-(1H-pyrazol-1-yl)propanoicacid (Cap-129)

Step 1. Preparation of(S)-2-(benzyloxycarbonylamino)-3-(1H-pyrazol-1-yl)propanoic acid (cj-31)

A suspension of (S)-benzyl 2-oxooxetan-3-ylcarbamate (0.67 g, 3.03mmol), and pyrazole (0.22 g, 3.29 mmol) in CH₃CN (12 mL) was heated at50° C. for 24 h. The mixture was cooled to rt overnight and the solidfiltered to afford(S)-2-(benzyloxycarbonylamino)-3-(1H-pyrazol-1-yl)propanoic acid (330.1mg). The filtrate was concentrated in vacuo and then triturated with asmall amount of CH₃CN (ca. 4 mL) to afford a second crop (43.5 mg).Total yield 370.4 mg (44%).

m.p. 165.5-168° C. lit m.p. 168.5-169.5 Vederas et al. J. Am. Chem. Soc.1985, 107, 7105.

¹HNMR (400 MHz, CH₃OD) δ 7.51 (d, J=2.0, 1H), 7.48 (s, J=1.5 Hz, 1H),7.24-7.34 (m, 5H), 6.23 m, 1H), 5.05 (d, 12.7 H, 1H), 5.03 (d, J=12.7Hz, 1H), 4.59-4.66 (m, 2H), 4.42-4.49 (m, 1H). LCMS: Anal. Calcd. forC₁₄H₁₅N₃O₄: 289; found: 290 (M+H)⁺.

Step 2. Preparation of(S)-2-(methoxycarbonylamino)-3-(1H-pyrazol-1-yl)propanoic acid (Cap-129)

(S)-2-(benzyloxycarbonylamino)-3-(1H-pyrazol-1-yl)propanoic acid (0.20g, 0.70 mmol) was hydrogenated in the presence of Pd—C (45 mg) in MeOH(5 mL) at atmospheric pressure for 2 h. The product appeared to beinsoluble in MeOH, therefore the rxn mixture was diluted with 5 mL H₂Oand a few drops of 6N HCl. The homogeneous solution was filtered throughdiatomaceous earth (Celite®), and the MeOH removed in vacuo. Theremaining solution was frozen and lyophyllized to give a yellow foam(188.9 mg). This material was suspended in THF—H₂O (1:1, 10 mL) and thencooled to 0° C. To the cold mixture was added NaHCO₃ (146.0 mg, 1.74mmol) carefully (evolution of CO₂). After gas evolution had ceased (ca.15 min) ClCO₂Me (0.06 mL, 0.78 mmol) was added dropwise. The mixture wasallowed to stir for 2 h and was acidified to pH˜2 with 6N HCl and pouredinto EtOAc. The layers were separated and the aqueous phase extract withEtOAC (×5). The combined organic layers were washed (brine), dried(Na₂SO₄), filtered, and concentrated to give the title compound as acolorless solid (117.8 mg, 79%).

¹HNMR (400 MHz, DMSO-d₆) δ 13.04 (s, 1H), 7.63 (d, J=2.6 Hz, 1H), 7.48(d, J=8.1 Hz, 1H), 7.44 (d, J=1.5 Hz, 1H), 6.19 (app t, J=2.0 Hz, 1H),4.47 (dd, J=3.0, 12.9 Hz, 1H), 4.29-4.41 (m, 2H), 3.48 (s, 3H). LCMS:Anal. Calcd. for C₈H₁₁N₃O₄: 213; found: 214 (M+H)⁺.

Cap-130. N-Acetyl-(R)-Phenylglycine

Cap-130 was prepared by acylation of commercially available(R)-phenylglycine analgous to the procedure given in: Calmes, M.;Daunis, J.; Jacquier, R.; Verducci, J. Tetrahedron, 1987, 43(10), 2285.

EXAMPLES

The present disclosure will now be described in connection with certainembodiments which are not intended to limit its scope. On the contrary,the present disclosure covers all alternatives, modifications, andequivalents as can be included within the scope of the claims. Thus, thefollowing examples, which include specific embodiments, will illustrateone practice of the present disclosure, it being understood that theexamples are for the purposes of illustration of certain embodiments andare presented to provide what is believed to be the most useful andreadily understood description of its procedures and conceptual aspects.

Solution percentages express a weight to volume relationship, andsolution ratios express a volume to volume relationship, unless statedotherwise. Nuclear magnetic resonance (NMR) spectra were recorded eitheron a Bruker 300, 400, or 500 MHz spectrometer; the chemical shifts (6)are reported in parts per million. Flash chromatography was carried outon silica gel (SiO₂) according to Still's flash chromatography technique(J. Org. Chem. 1978, 43, 2923).

Purity assessment and low resolution mass analysis were conducted on aShimadzu LC system coupled with Waters Micromass ZQ MS system. It shouldbe noted that retention times may vary slightly between machines. The LCconditions employed in determining the retention time (RT) were:

Condition 1

-   Column=Phenomenex-Luna 3.0×50 mm S10-   Start % B=0-   Final % B=100-   Gradient time=2 min-   Stop time=3 min-   Flow Rate=4 mL/min-   Wavelength=220 nm-   Solvent A=0.1% TFA in 10% methanol/90% H₂O-   Solvent B=0.1% TFA in 90% methanol/10% H₂O

Condition 2

-   Column=Phenomenex-Luna 4.6×50 mm S10-   Start % B=0-   Final % B=100-   Gradient time=2 min-   Stop time=3 min-   Flow Rate=5 mL/min-   Wavelength=220 nm-   Solvent A=0.1% TFA in 10% methanol/90% H₂O-   Solvent B=0.1% TFA in 90% methanol/10% H₂O

Condition 3

-   Column=HPLC XTERRA C18 3.0×50 mm S7-   Start % B=0-   Final % B=100-   Gradient time=3 min-   Stop time=4 min-   Flow Rate=4 mL/min-   Wavelength=220 nm-   Solvent A=0.1% TFA in 10% methanol/90% H₂O-   Solvent B=0.1% TFA in 90% methanol/10% H₂O-   Method A: LCMS-Xterra MS C-18 3.0×50 mm, 0 to 100% B over 30.0    minute gradient, 1 minute hold time, A=5% acetonitrile, 95% water,    10 mm ammonium acetate, B=95% acetonitrile, 5% water, 10 mm ammonium    acetate.-   Method B: HPLC-X-Terra C-18 4.6×50 mm, 0 to 100% B over 10.0 minute    gradient, 1 minute hold time, A=10% methanol 90% water 0.1% TFA,    B=90% methanol 10% water 0.1% TFA-   Method C: HPLC-YMC C-18 4.6×50 mm, 0 to 100% B over 10.0 minute    gradient, 1 minute hold time, A=10% methanol 90% water 0.2% H₃PO₄,    B=90% methanol 10% water 0.2% H₃PO₄.-   Method D: HPLC-Phenomenex C-18 4.6×150 mm, 0 to 100% B over 10.0    minute gradient, 1 minute hold time, A=10% methanol 90% water 0.2%    H₃PO₄, B=90% methanol 10% water 0.2% H₃PO₄-   Method E: LCMS-Gemini C-18 4.6×50 mm, 0 to 100% B over 10.0 minute    gradient, 1 minute hold time, A=5% acetonitrile, 95% water, 10 mm    ammonium acetate, B=95% acetonitrile, 5% water, 10 mm ammonium    acetate.-   Method F: LCMS-Luna C-18 3.0×50 mm, 0 to 100% B over 7.0 minute    gradient, 1 minute hold time, A=5% acetonitrile, 95% water, 10 mm    ammonium acetate, B=95% acetonitrile, 5% water, 10 mm ammonium    acetate.

Example 1(1R,1′R)-2,2′-(4,4′-biphenyldiylbis(1H-imidazole-5,2-diyl(2S)-2,1-pyrrolidinediyl))bis(N,N-dimethyl-2-oxo-1-phenylethanamine)

Example 1 Step a

N,N-Diisopropylethylamine (18 mL, 103.3 mmol) was added dropwise, over15 minutes, to a heterogeneous mixture of N-Boc-L-proline (7.139 g,33.17 mmol), HATU (13.324 g, 35.04 mmol), the HCl salt of2-amino-1-(4-bromophenyl)ethanone (8.127 g, 32.44 mmol), and DMF (105mL), and stirred at ambient condition for 55 minutes. Most of thevolatile component was removed in vacuo, and the resulting residue waspartitioned between ethyl acetate (300 mL) and water (200 mL). Theorganic layer was washed with water (200 mL) and brine, dried (MgSO₄),filtered, and concentrated in vacuo. A silica gel mesh was prepared fromthe residue and submitted to flash chromatography (silica gel; 50-60%ethyl acetate/hexanes) to provide ketoamide 1a as a white solid (12.8g). ¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz): δ 8.25-8.14 (m, 1H), 7.92 (brd, J=8.0, 2H), 7.75 (br d, J=8.6, 2H), 4.61 (dd, J=18.3, 5.7, 1H), 4.53(dd, J=18.1, 5.6, 1H), 4.22-4.12 (m, 1H), 3.43-3.35 (m, 1H), 3.30-3.23(m, 1H), 2.18-2.20 (m, 1H), 1.90-1.70 (m, 3H), 1.40/1.34 (two app br s,9H). LC (Cond. 1): RT=1.70 min; LC/MS: Anal. Calcd. for [M+Na]⁺C₁₈H₂₃BrN₂NaO₄: 433.07; found 433.09.

Analogous compounds such as intermediate 1-1a to 1-5a can be prepared byincorporating the appropriately substituted amino acid and aryl bromideisomer.

¹H NMR (500 MHz, DMSO-d₆) δ ppm 1.35/1.40 (two br s, 9H), 2.27-2.42 (m,1H), 2.73-2.95 (m, 1H), 3.62-3.89 (m, 2H), 4.36-4.50 (m, 1H), 4.51-4.60(m, 1H), 4.62-4.73 (m, 1H), 7.75 (d, J=8.24 Hz, 2H), 7.92 (d, J=7.63 Hz,2H), 8.31-8.49 (m, 1H). HPLC XTERRA C-18 4.6×30 mm, 0 to 100% B over 4minutes, 1 minute hold time, A=90% water, 10% methanol, 0.2% H₃PO₄,B=10% water, 90% methanol, 0.2% H₃PO₄, RT=1.59 minutes, 99% homogeneityindex. LCMS: Anal. Calcd. for C₁₈H₂₁BrF₂N₂O₄: 446.06; found: 445.43(M−H)⁻.

¹H NMR (500 MHz, DMSO-d₆) δ ppm (8.25 1H, s), 7.91 (2H, d, J=8.24Hz),7.75 (2H, d, J=8.24 Hz), 4.98 (1H, s), 4.59-4.63 (1H, m), 4.46-4.52 (1H,m), 4.23 (1H, m), 3.37 (1H, s), 3.23-3.28 (1H, m), 2.06 (1H, m), 1.88(1H, s), 1.38 (3H, s), 1.33 (6H, s). LCMS-Phenomenex C-18 3.0×50 mm, 0to 100% B over 4.0 minute gradient, 1 minute hold time, A=10% methanol90% water 0.1% TFA, B=90% methanol 10% water 0.1% TFA mobile phase,RT=3.34 minutes, Anal Calcd. for C₁₈H₂₃BrN₂O₅ 427.30; found 428.08(M+H)⁻.

¹H NMR (500 MHz, DMSO-d₆) δ ppm 8.30 (1H, s) 7.93-7.96 (2H, m) 7.76 (2Hd, J=8.24 Hz) 5.13 (1H, s) 4.66-4.71 (1H, m) 4.52-4.55 (1H, m) 4.17 (1H,m) 3.51 (1H, s) 3.16-3.19 (1H, m) 2.36 (1H, m) 1.78 (1H, s) 1.40 (s,3H), 1.34 (s, 6H). LCMS-Phenomenex C-18 3.0×50 mm, 0 to 100% B over 4.0minute gradient, 1 minute hold time, A=10% methanol 90% water 0.1% TFA,B=90% methanol 10% water 0.1% TFA, RT=3.69 minutes, Anal Calcd. forC₁₈H₂₃BrN₂O₅ 427.30; found 428.16 (M+H)⁺.

¹H NMR (500 MHz, DMSO-d₆) δ ppm 1.29-1.47 (m, 9H), 1.67-1.90 (m, 3H),2.00-2.20 (m, 1H), 3.23-3.30 (m, 1H), 3.34-3.44 (m, 1H), 4.16 (dd, 1H),4.57 (q, 2H), 7.51 (t, J=7.78 Hz, 1H), 7.86 (dd, J=7.93, 1.22 Hz, 1H),7.98 (d, J=7.63 Hz, 1H), 8.11 (s, 1H), 8.15-8.29 (m, 1H). LC/MS(M+Na)⁺=433.12/435.12.

LCMS conditions: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 2minutes, 1 minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10%water, 90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume. RT=1.93min; LRMS: Anal. Calcd. for C₁₉H₁₈BrN₂O₄ 418.05; found: 419.07 (M+H)⁺.

Example 1 Step b

A mixture of ketoamide 1a (12.8 g, 31.12 mmol) and NH₄OAc (12.0 g, 155.7mmol) in xylenes (155 mL) was heated in a sealed tube at 140° C. for 2hours. The volatile component was removed in vacuo, and the residue waspartitioned carefully between ethyl acetate and water, whereby enoughsaturated NaHCO₃ solution was added so as to make the pH of the aqueousphase slightly basic after the shaking of the biphasic system. Thelayers were separated, and the aqueous layer was extracted with anadditional ethyl acetate. The combined organic phase was washed withbrine, dried (MgSO₄), filtered, and concentrated in vacuo. The resultingmaterial was recrystallized from ethyl acetate/hexanes to provide twocrops of imidazole 1b as a light-yellow dense solid, weighing 5.85 g.The mother liquor was concentrated in vacuo and submitted to a flashchromatography (silica gel; 30% ethyl acetate/hexanes) to provide anadditional 2.23 g of imidazole 1b. ¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz):δ 12.17/11.92/11.86 (m, 1H), 7.72-7.46/7.28 (m, 5H), 4.86-4.70 (m, 1H),3.52 (app br s, 1H), 3.36 (m, 1H), 2.30-1.75 (m, 4H), 1.40/1.15 (app brs, 9H). LC (Cond. 1): RT=1.71 min; >98% homogeneity index; LC/MS: Anal.Calcd. for [M+H]⁺ C₁₈H₂₃BrN₃O₂: 392.10; found 391.96; HRMS: Anal. Calcd.for [M+H]⁺ C₁₈H₂₃BrN₃O₂: 392.0974; found 392.0959

The optical purity of the two samples of 1b were assessed using thechiral HPLC conditions noted below (ee>99% for the combined crops;ee=96.7% for the sample from flash chromatography):

-   Column: Chiralpak AD, 10 um, 4.6×50 mm-   Solvent: 2% ethanol/heptane (isocratic)-   Flow rate: 1 mL/min-   Wavelength: either 220 or 254 nm-   Relative retention time: 2.83 minutes (R), 5.34 minutes (S)

Analogous compounds such as intermediates 1-1b to 1-4b can be preparedby incorporating the appropriate ketoamide.

¹H NMR (500 MHz, DMSO-d₆) δ ppm 1.17/1.40 (two br s, 9H), 2.50-2.74 (m,J=25.64 Hz, 1H), 2.84-3.07 (m, 1H), 3.88 (d, J=10.07 Hz, 2H), 5.03 (s,1H), 7.50 (d, J=8.55 Hz, 2H), 7.60 (s, 1H), 7.70 (d, J=8.55 Hz, 2H),12.10 (s, 1H). HPLC XTERRA C-18 4.6×30 mm, 0 to 100% B over 4 minutes, 1minute hold time, A=90% water, 10% methanol, 0.2% H₃PO₄, B=10% water,90% methanol, 0.2% H₃PO₄, RT=1.59 minutes, 99% homogeneity index; LCMS:Anal. Calcd. for C₁₈H₂₀BrF₂N₃O₂: 428.27; found: 428.02 (M)⁺.

¹H NMR (500 MHz, DMSO-d₆) δ ppm 11.89-11.99 (1H, m), 7.68 (2H, d, J=8.54Hz), 7.52-7.59 (1H, m), 7.48 (2H, d, J=8.54 Hz), 4.80 (1H, m), 4.33 (1H,s), 3.51-3.60 (1H, m), 3.34 (1H, d, J=10.99 Hz), 2.14 (1H, s), 1.97-2.05(1H, m), 1.37 (3H, s), 1.10 (6H, s); LCMS-Phenomenex C-18 3.0×50 mm, 0to 100% B over 4.0 minute gradient, 1 minute hold time, A=10% methanol90% water 0.1% TFA, B=90% methanol 10% water 0.1% TFA, (RT=3.23 min)Anal Calcd. for C₁₈H₂₂BrN₃O₃ 408.30; found 409.12 (M+H)⁺.

¹H NMR (500 MHz, DMSO-d₆) δ ppm 12.06-12.24 (1H, m), 7.58-7.69 (5H, m),4.84-4.95 (1H, m), 4.34 (1H, s), 3.61 (1H, s), 3.34-3.40 (1H, m), 2.52(1H, s), 1.92-2.20 (1H, m), 1.43 (3H, s), 1.22 (6H, s); LCMS-PhenomenexC-18 3.0×50 mm, 0 to 100% B over 4.0 minute gradient, 1 minute holdtime, A=10% methanol 90% water 0.1% TFA, B=90% methanol 10% water 0.1%TFA, (RT=3.41 min) Anal Calcd. for C₁₈H₂₂BrN₃O₃ 408.30; found 409.15(M+H)⁺.

¹H NMR (500 MHz, DMSO-d₆) δ ppm 0.98-1.51 (m, 9H), 1.82-2.12 (m, 3H),2.31-2.48 (m, 1H), 3.30-3.51 (m, 1H), 3.52-3.66 (m, 1H), 4.88-5.16 (m,1H), 7.47 (t, J=7.93 Hz, 1H), 7.61 (d, J=7.93 Hz, 1H), 7.81 (d, J=7.93Hz, 1H), 8.04 (s, 1H), 8.12 (d, J=28.38 Hz, 1H), 14.65 (s, 1H). LC/MS(M+H)⁺=391.96/393.96.

Additional imidazole analogs made following procedures similar to thosedescribed above.

LC conditions: Condition 1: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% Bover 3 minutes, 1 minute hold time, A=90% water, 10% methanol, 0.1% TFA,B=10% water, 90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

Condition 2: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 2 minutes,1 minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water,90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

Example Structure Data 1-5b

RT = 1.70 minutes(condition 2, 98%);LRMS: Anal. Calcd. forC₁₉H₁₈BrN₃O₂399.05;found: 400.08 (M + H)⁺. 1-6b

RT = 1.64 minutes(condition 2, 98%);LRMS: Anal. Calcd. forC₁₇H₂₂N₃O₂379.09;found: 380.06 (M + H)⁺. 1-7b

RT = 2.28 minutes(95%); LRMS: Anal.Calcd. for C₂₀H₂₁BrN₃O₂414.08; found:414.08(M + H)⁺; HRMS: Anal.Calcd. for C₂₀H₂₁BrN₃O₂414.0817;found:414.0798 (M + H)⁺.

Example 1 Step c

Pd(Ph₃P)₄ (469 mg, 0.406 mmol) was added to a pressure tube containing amixture of bromide 1b (4.008 g, 10.22 mmol), bis(pinacolato)diboron(5.422 g, 21.35 mmol), potassium acetate (2.573 g, 26.21 mmol) and1,4-dioxane (80 mL). The reaction flask was purged with nitrogen, cappedand heated with an oil bath at 80° C. for 16.5 hours. The reactionmixture was filtered and the filtrate was concentrated in vacuo. Thecrude material was partitioned carefully between CH₂Cl₂ (150 mL) and anaqueous medium (50 mL water+10 mL saturated NaHCO₃ solution). Theaqueous layer was extracted with CH₂Cl₂, and the combined organic phasewas dried (MgSO₄), filtered, and concentrated in vacuo. The resultingmaterial was purified with flash chromatography (sample was loaded witheluting solvent; 20-35% ethyl acetate/CH₂Cl₂) to provide boronate 1c,contaminated with pinacol, as an off-white dense solid; the relativemole ratio of 1c to pinacol was about 10:1 (¹H NMR). The sample weighed3.925 g after ˜2.5 days exposure to high vacuum. ¹H NMR (DMSO-d₆, δ=2.5ppm, 400 MHz): 12.22/11.94/11.87 (m, 1H), 7.79-7.50/7.34-7.27 (m, 5H),4.86-4.70 (m, 1H), 3.52 (app br s, 1H), 3.36 (m, 1H), 2.27-1.77 (m, 4H),1.45-1.10 (m, 21H). LC (Cond. 1): RT=1.64 min; LC/MS: Anal. Calcd. for[M+H]⁺ C₂₄H₃₅BN₃O₄: 440.27; found 440.23.

Analogous compounds such as intermediates 1-1c to 1-4c can be preparedby incorporating the appropriate aryl bromide.

¹H NMR (500 MHz, DMSO-d₆) δ ppm 1.16 (s, 8H), 1.29 (s, 13H), 2.51-2.72(m, 1H), 2.84-3.03 (m, 1H), 3.79-4.00 (m, 2H), 4.88-5.21 (m, 1H), 7.62(d, J=7.93 Hz, 2H), 7.67 (s, 1H), 7.76 (d, J=7.93 Hz, 2H), 12.11/12.40(two br s, 1H). HPLC GEMINI C-18 4.6×50 mm, 0 to 100% B over 4 minutes,1 minute hold time, A=95% water, 5% acetonitrile, 0.1% NH₄OAc, B=5%water, 95% acetonitrile, 0.1% NH₄OAc, RT=1.62 minutes, 99% homogeneityindex. LCMS: Anal. Calcd. for C₃₄H₃₂BF₂N₃O₄: 475.34; found: 474.78(M−H)⁻.

¹H NMR (500 MHz, DMSO-d₆) δ ppm 11.97 (1H, m), 7.62-7.75 (5H, m), 5.05(1H d, J=3.36 Hz), 4.82 (m, 1H), 4.35 (m, 1H), 3.58 (1H, m), 2.389 (1H,s), 2.17 (1 H, m), 1.38 (3H, s), 1.30 (12H, s), 1.1 (6H, s);LCMS-Phenomenex C-18 3.0×50 mm, 0 to 100% B over 4.0 minute gradient, 1minute hold time, A=5% acetonitrile, 95% water, 10 mm ammonium acetate,B=95% acetonitrile, 5% water, 10 mm ammonium acetate, RT=3.63 minutes,Anal. Calcd. for C₂₄H₃₄BN₃O₅ 455.30; found 456.31 (M+H)⁺.

¹H NMR (500 MHz, DMSO-d₆) δ ppm 12.05-12.24 (1H, m), 7.61-7.73 (5H, m),4.83-5.01 (1H, m), 4.33 (1H, s), 3.54-3.63 (1H, m), 3.39-3.80 (1H, m),2.38-2.49 (1H, m), 1.98-2.01 (1H, m), 1.42 (3H, s), 1.34 (12H, s), 1.21(6H, s); LCMS-Phenomenex C-18 3.0×50 mm, 0 to 100% B over 4.0 minutegradient, 1 minute hold time, A=10% methanol 90% water 0.1% TFA, B=90%methanol 10% water 0.1% TFA, RT=3.64 minutes, Anal. Calcd. forC₂₄H₃₄BN₃O₅ 455.30; found 456.30 (M+H)⁺.

¹H NMR (500 MHz, DMSO-d₆) δ ppm 1.02-1.54 (m, 21H), 1.75-2.07 (m, 3H),2.09-2.33 (m, 1H), 3.32-3.44 (m, 1H), 3.55 (s, 1H), 4.69-4.94 (m, 1H),7.33 (t, J=7.32 Hz, 1H), 7.41-7.57 (m, 2H), 7.84 (d, J=7.32 Hz, 1H),8.08 (s, 1H), 11.62-12.07 (m, 1H). LC/MS (M+H)⁺=440.32.

Additional boronic esters: Conditions for 1-5c through 1-10c

LCMS conditions: Condition 1: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100%B over 3 minutes, 1 minute hold time, A=90% water, 10% methanol, 0.1%TFA, B=10% water, 90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

Condition 2: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 2 minutes,1 minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water,90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

1-5c

RT = 1.84 minutes(condition 2); LCMS:Anal. Calcd. forC₂₇H₃₂BN₃O₄473;found: 474 (M + H)⁺. 1-6c

RT = 1.84 minutes(condition 2); LCMS:Anal. Calcd. forC₂₂H₃₂BN₃O₄413;found: 414 (M + H)⁺. 1-7c

RT = 1.85 minutes(condition 2); LRMS:Anal. Calcd. forC₂₅H₃₁RN₃O₄ 448;found:448 9M + H)⁺. 1-8c

RT = 2.49 (76%, boronicester) and 1.81 (21.4%,boronic acid); LCMS:Anal.Calcd. forC₂₃H₃₅N₃O₄B 428.27;found: 428.27 (M + H)⁺;HRMS: Anal.Calcd.for C₂₃H₃₅N₃O₄B428.2721; found:428.2716 (M + H)⁺. 1-9c

RT = 2.54 (74.2%,boronic ester) and 1.93(25.8%, boronic acid);LRMS:Anal. Calcd. forC₂₆H₃₃N₃O₄B 462.26;found: 462.26 (M + H)⁺;HRMS: Anal.Calcd.for C₂₆H₃₃N₃O₄B462.2564; found:462.2570 (M + H)⁺. 1-10c

RT = 1.91(64.5%,boronic ester) and 1.02(33.8%, boronic acid);LRMS: Anal.Calcd. forC₂₆H₃₂N₄O₃ ¹⁰B 458.26;found: 458.28 (M + H)⁺;HRMS: Anal.Calcd.for C₂₆H₃₂N₄O₃ ¹⁰B458.2604; found:458.2617 (M + H)⁺.

Example 1 Step ddi-tert-butyl(2S,2′S)-2,2′-(4,4′-biphenyldiylbis(1H-imidazole-5,2-diyl))di(1-pyrrolidinecarboxylate)

Pd(Ph₃P)₄ (59.9 mg, 0.0518 mmol) was added to a mixture of bromide 1b(576.1 mg, 1.469 mmol), boronate 1c (621.8 mg, 1.415 mmol), NaHCO₃(400.4 mg, 4.766 mmol) in 1,2-dimethoxyethane (12 mL) and water (4 mL).The reaction mixture was flushed with nitrogen, heated with an oil bathat 80° C. for 5.75 hours, and then the volatile component was removed invacuo. The residue was partitioned between 20% methanol/CHCl₃ (60 mL)and water (30 mL), and the aqueous phase was extracted with 20%methanol/CHCl₃ (30 mL). The combined organic phase was washed withbrine, dried (MgSO₄), filtered, and concentrated in vacuo. A silica gelmesh was prepared from the resulting crude material and submitted toflash chromatography (ethyl acetate) to provide dimer 1d, contaminatedwith Ph₃PO, as an off-white solid (563 mg). ¹H NMR (DMSO-d₆, δ=2.5 ppm,400 MHz): δ 12.21-12-16/11.95-11.78 (m, 2H), 7.85-7.48/7.32-7.25 (m,10H), 4.90-4.71 (m, 2H), 3.60-3.32 (m, 4H), 2.30-1.79 (m, 8H), 1.46-1.10(m, 18H). LC (Cond. 1b): RT=1.77 min; LC/MS: Anal. Calcd. for [M+H]⁺C₃₆H₄₅BN₆O₄: 625.35; found 625.48.

Additional biphenyl analogs were prepared similarly.

LC conditions for Examples 1-5d through 1-7d: Condition 1: PhenomenexLUNA C-18 4.6×50 mm, 0 to 100% B over 3 minutes, 1 minute hold time,A=90% water, 10% methanol, 0.1% TFA, B=10% water, 90% methanol, 0.1%TFA, 220 nm, 5 μL injection volume.

Condition 2: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 2 minutes,1 minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water,90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

Characterization Example Compound Name Structure Data 1-5d di-tert-butyl(4,4′-biphenyldiylbis(1H-imidazole-5,2-diyl(1S)-1,1-ethanediyl)bis(meth-ylcarbamate)

RT = 1.64 minutes(>95%); Condition2;LCMS: Anal.Calcd C₃₄H₄₅N₆O₄601.35;found:601.48 (M + H)⁺;LRMS:Anal.Calcd. forC₃₄H₄₄N₆O₄600.34; found:601.32(M + H)⁺. 1-6d tert-butyl(2S)-2-(5-(4′-(2-((1S)-1-((tert-butoxy-carbonyl)(meth-yl)amino)ethyl)-1H-imidazol-5-yl)-4-biphenylyl)-1H-imidaozl-2-yl)-1-pyrrolidine-carboxylate

RT = 1.63 minutes(>95%); Condition2; LCMS: Anal.CalcdC₃₅H₄₅N₆O₄613.34;found:613.56 (M + H)⁺;LRMS: Anal.Calcd.forC₃₅H₄₄N₆O₄612.34; found:613.33 (M + H)⁺. 1-7d benzyl(2S)-2-(5-(4′-(2-((1S)-1-((tert-butoxy-carbonyl)(meth-yl)amino)ethyl)-1H-imidazol-5-yl)-4-biphenylyl)-1H-imidazol-2-yl)-1-pyrrolidine-carboxylate

RT = 1.65 minutes(>95%); Condition2; LCMS: Anal.CalcdC₃₈H₄₃N₆O₄647.33;found:647.44 (M + H)⁺;LRMS: Anal.Calcd.forC₃₈H₄₂N₆O₄646.33; found:647.34 (M + H)⁺.

Example 1 Step e5,5′-(4,4′-biphenyldiyl)bis(2-((2S)-2-pyrrolidinyl)-1H-imidazole)

A mixture of carbamate 1d (560 mg) and 25% TFA/CH₂Cl₂ (9.0 mL) wasstirred at ambient condition for 3.2 hours. The volatile component wasremoved in vacuo, and the resulting material was free based using an MCXcolumn (methanol wash; 2.0 M NH₃/methanol elution) to providepyrrolidine 1e as a dull yellow solid (340 mg). ¹H NMR (DMSO-d₆, δ=2.5ppm, 400 MHz): δ11.83 (br s, 2H), 7.80 (d, J=8.1, 4H), 7.66 (d, J=8.3,4H), 7.46 (br s, 2H), 4.16 (app t, J=7.2, 2H), 2.99-2.69 (m, 6H),2.09-2.00 (m, 2H), 1.94-1.66 (m, 6H). LC (Cond. 1): RT=1.27 min; >98%homogeneity index; LC/MS: Anal. Calcd. for [M+H]⁻ C₂₆H₂₉N₆: 425.25;found 425.25; HRMS: Anal. Calcd. for [M+H]⁻ C₂₆H₂₉N₆: 425.2454; found425.2448

Additional analogs were prepared similarly:

Example Compound Name Structure Data 1-5e

RT = 1.37 min;LCMS: Anal.Calcd. forC₂₅H₂₈N₆ 412;found: 413(M + H)⁺. 1-6e

RT = 1.43 min;LCMS: Anal.Calcd. forC₃₃H₃₅N₆O₂ 547;found: 547(M + H)⁺.1-7e

RT = 1.12 min;LRMS: Anal.Calcd. forC₂₄H₂₈N₆ 400.24;found: 401.22(M +H)⁺.

LC Conditions for 1-5e through 1-7e: Phenomenex LUNA C-18 4.6×50 mm, 0to 100% B over 2 minutes, 1 minute hold time, A=90% water, 10% methanol,0.1% TFA, B=10% water, 90% methanol, 0.1% TFA, 220 nm, 5 μL injectionvolume.

Example 1(1R,1′R)-2,2′-(4,4′-biphenyldiylbis(1H-imidazole-5,2-diyl(2S)-2,1-pyrrolidinediyl))bis(N,N-dimethyl-2-oxo-1-phenylethanamine)

HATU (44.6 mg, 0.117 mmol) was added to a mixture of pyrrolidine 1e(22.9 mg, 0.054 mmol), diisopropylethylamine (45 μL, 0.259 mmol) andCap-1 (28.1 mg, 0.13 mmol) in DMF (1.5 mL), and the resulting mixturewas stirred at ambient for 90 minutes. The volatile component wasremoved in vacuo, and the residue was purified first by MCX (methanolwash; 2.0 M NH₃/methanol elution) and then by a reverse phase HPLCsystem (H₂O/methanol/TFA) to provide the TFA salt of Example 1 as anoff-white foam (44.1 mg). ¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz): δ 10.25(br s, 2H), 8.20-7.10 (m, 20H), 5.79-5.12 (m, 4H), 4.05-2.98 (m, 4H),2.98-2.62 (m, 6H), 2.50-1.70 (m, 14H), [Note: the signal of theimidazole NH was too broad to assign a chemical shift]; LC (Cond. 1):RT=1.40 min; >98% homogeneity index; LC/MS: Anal. Calcd. for [M+H]⁺C₄₆H₅₁N₈O₂: 747.41; found 747.58

Ex- am- Compound Characteriza- ple Name Structure tion Data 24-18-1dimethyl(4,4′-biphenyl-diylbis(1H-imidazole-5,2-diyl(1S)-1,1-ethane-diyl(methyli-mino)(1R)-2-oxo-1-phenyl-2,1-ethane-diyl)))biscar-bamate

RT = 1.55min¹;LRMS: Anal.Calcd. forC₄₄H₄₆N₈O₆ 782.35;found:783.37(M +H)⁺;HRMS:Anal. Calcd.forC₄₄H₄₇N₈O₆783.3619found:783.3630(M + H)⁺.24-18-2(2R,2′R)-N,N′-(4,4′-biphenyl-diylbis(1H-imidazole-5,2-diyl(1S)-1,1-ethane-diyl))bis(2-(dimethyl-amino)-N-methyl-2-phenyl-acetamide)

RT = 1.16min¹;LRMS: Anal.Calcd. forC₄₄H₅₀N₈O₂ 722.41;found: 723.41(M +H)⁺;HRMS:Anal.Calcd. forC₄₄H₅₁N₈O₂723.4135found:723.4152(M + H)⁺.24-18-3(2R,2′R)-N,N′-(4,4′-biphenyl-diylbis(1H-imidazole-5,2-diyl(1S)-1,1-ethane-diyl))bis(N-meth-yl-2-phenyl-2-(1-piperi-dinyl)acet-amide)

RT = 1.28min¹;LRMS: Anal.Calcd. forC₅₀H₅₈N₈O₂ 802.47;found: 803.50(M +H)⁺;HRMS:Anal.Calcd. forC₅₀H₅₉N₈O₂803.4761found:803.4778(M + H)⁺.24-18-4 methyl((1R)-2-((2S)-2-(5-(4′-(2-((1S)-1-(((2R)-2-((methoxy-carbonyl)a-mino)-2-phenyl-acetyl)(meth-yl)ami-no)ethyl)-1H-imidazol-5-yl)-4-bi-phenylyl)-1H-imidazol-2-yl)-1-pyrrolidi-nyl)-2-oxo-1-phenyl-ethyl)carba-mate

RT = 1.53min¹;LRMS: Anal.Calcd. forC₄₅H₄₆N₈O₆ 794.35;found: 795.39(M +H)⁺;HRMS:Anal.Calcd. forC₄₅H₄₇N₈O₆795.3619found:795.3616(M + H)⁺.24-18-5(2R)-2-(dimethyl-amino)-N-((1S)-1-(5-(4′-(2-((2S)-1-((2R)-2-(dimethyl-amino)-2-phenyl-acetyl)-2-pyrroli-dinyl)-1H-imida-zol-5-yl)-4-biphenyl-yl)-1H-imidazol-2-yl)ethyl)-N-methyl-2-phenyl-acetamide

RT = 1.21¹;LRMS:Anal.Calcd. forC₄₅H₅₀N₈O₂ 734.41;found: 735.46(M +H)⁺;HRMS:Anal.Calcd. forC₄₅H₅₁N₈O₂735.4135found:735.4136(M + H)⁺. ¹LCConditions for 24-18-1 through 24-18-5: Phenomenex LUNA C-18 4.6 × 50mm, 0 to 100% B over 2 minutes, 1 minute hold time, A = 90% water, 10%methanol, 0.1% TFA, B = 10% water, 90% methanol, 0.1% TFA, 220 nm, 5 μLinjection volume.

Example 28methyl((1R)-2-oxo-1-phenyl-2-((2S)-2-(5-(4′-(2-((2S)-1-(phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-4-biphenylyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)ethyl)carbamate

Example 28 Step a

HATU (19.868 g, 52.25 mmol) was added to a heterogeneous mixture ofN-Cbz-L-proline (12.436 g, 49.89 mmol) and the HCl salt of2-amino-1-(4-bromophenyl)ethanone (12.157 g, 48.53 mmol) in DMF (156mL). The mixture was lowered in an ice-water bath, and immediatelyafterward N,N-diisopropylethylamine (27 mL, 155 mmol) was added dropwiseto it over 13 minutes. After the addition of the base was completed, thecooling bath was removed and the reaction mixture was stirred for anadditional 50 minutes. The volatile component was removed in vacuo;water (125 mL) was added to the resulting crude solid and stirred forabout 1 hour. The off-white solid was filtered and washed with copiouswater, and dried in vacuo to provide ketoamide 28a as a white solid(20.68 g). ¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz): δ 8.30 (m, 1H), 7.91(m, 2H), 7.75 (d, J=8.5, 2H), 7.38-7.25 (m, 5H), 5.11-5.03 (m, 2H),4.57-4.48 (m, 2H), 4.33-4.26 (m, 1H), 3.53-3.36 (m, 2H), 2.23-2.05 (m,1H), 1.94-1.78 (m, 3H); LC (Cond. 1): RT=1.65 min; 98% homogeneityindex; LC/MS: Anal. Calcd. for [M+H]⁺ C₂₁H₂₂BrN₂O₄: 445.08; found445.31.

Example 28 Step b

Ketoamide 28a (10.723 g, 24.08 mmol) was converted to 28b according tothe procedure described for the synthesis of carbamate 1b, with theexception that the crude material was purified by flash chromatography(sample was loaded with eluting solvent; 50% ethyl acetate/hexanes).Bromide 28b was retrieved as an off-white foam (7.622 g). ¹H NMR(DMSO-d₆, δ=2.5 ppm, 400 MHz): δ 12.23/12.04/11.97 (m, 1H), 7.73-6.96(m, 10H), 5.11-4.85 (m, 3H), 3.61 (m, 1H), 3.45 (m, 1H), 2.33-184(m,4H). LC (Cond.1): RT=1.42 min; >95% homogeneity index; LC/MS: Anal.Calcd. for [M+H]⁺ C₂₁H₂₁BrN₃O₂: 426.08; found 426.31; HRMS: Anal. Calcd.for [M+H]⁺ C₂₁H₂₁BrN₃O₂: 426.0817; found: 426.0829. The optical purityof 28b was assessed using the following chiral HPLC methods, and an eeof 99% was observed.

-   Column: Chiralpak AD, 10 um, 4.6×50 mm-   Solvent: 20% ethanol/heptane (isocratic)-   Flow rate: 1 mL/min-   Wavelength: 254 nm-   Relative retention time: 1.82 minutes (R), 5.23 minutes (S)

Example 28 Step c benzyltert-butyl(2S,2′S)-2,2′-(4,4′-biphenyldiylbis(1H-imidazole-5,2-diyl))di(1-pyrrolidinecarboxylate)

Pd(Ph₃P)₄ (711.4 mg, 0.616 mmol) was added to a mixture of boronateester 1c (7.582 g, ˜17 mmol), bromide 28b (7.62 g, 17.87 mmol), NaHCO₃(4.779 g, 56.89 mmol) in 1,2-dimethoxyethane (144 mL) and water (48 mL).The reaction mixture was purged with N₂ and heated with an oil bath at80° C. for 15.5 hours, and then the volatile component was removed invacuo. The residue was partitioned between CH₂Cl₂ and water, and theaqueous layer was extracted with CH₂Cl₂. The combined organic phase wasdried (MgSO₄), filtered, and concentrated in vacuo. The resultingmaterial was submitted to flash chromatography (sample was loaded as asilica gel mesh; ethyl acetate used as eluent) to provide biphenyl 28cas an off-white foam containing Ph₃PO impurity (7.5 g). ¹H NMR (DMSO-d₆,δ=2.5 ppm, 400 MHz): δ 12.24-12.19 (m, 0.36H), 12.00-11.82 (m, 1.64H),7.85-6.98 (15H), 5.12-4.74 (4H), 3.68-3.34(4H), 2.34-1.79 (8H),1.41/1.17 (two br S, 9H); LC (Cond.1): RT=1.41 minutes; LC/MS: Anal.Calcd. for [M+H]⁺ C₃₉H₄₃N₆O₄: 659.34; found 659.52; HRMS: Anal. Calcd.for [M+H]⁺ C₃₉H₄₃N₆O₄: 659.3346; found 659.3374.

Example 28 Step dtert-butyl(2S)-2-(5-(4′-(2-((2S)-2-pyrrolidinyl)-1H-imidazol-5-yl)-4-biphenylyl)-1H-imidazol-2-yl)-1-pyrrolidinecarboxylate

K₂CO₃ (187.8 mg, 1.36 mmol) was added to a mixture of catalyst (10%Pd/C; 205.3 mg), carbamate 28c (1.018 g, ˜1.5 mmol), methanol (20 mL)and 3 pipet-drops of water. A balloon of H₂ was attached and the mixturewas stirred for 6 hours. Then, additional catalyst (10% Pd/C, 100.8 mg)and K₂CO₃ (101.8 mg, 0.738 mmol) were added and stirring continued for3.5 hours. During the hydrogenation process, the balloon of H₂ waschanged at intervals three times. The reaction mixture was filteredthrough a pad of diatomaceous earth (Celite® 521), and the filterate wasremoved in vacuo. The resulting crude material was submitted to flashchromatography using a short column (sample was loaded as a silica gelmesh; 0-20% methanol/CH₂Cl₂ used as eluent) to provide 28d as alight-yellow foam (605.6 mg). ¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz): δ12.18/11.89/11.82 (three br s, 2H), 7.83-7.29 (m, 10H), 4.89-4.73 (m,1H), 4.19 (app t, J=7.2, 1H), 3.55 (app br s, 1H), 3.40-3.35 (m, 1H),3.02-2.96 (m, 1H), 2.91-2.84(m, 1H), 2.30-1.69(m, 8H), 1.41/1.16 (two brs, 9H). Note: the signal of pyrrolidine NH appears to have overlappedwith signals in the 3.6-3.2 ppm region; LC (Cond. 1): RT=1.21 min; >95%homogeneity index; LC/MS: Anal. Calcd. for [M+H]⁺ C₃₁H₃₇N₆O₂: 525.30;found 525.40.

Example 28 Step e-f Example 28 Step etert-butyl(2S)-2-(5-(4′-(2-((2S)-1-((2R)-2-((methoxycarbonyl)amino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-4-biphenylyl)-1H-imidazol-2-yl)-1-pyrrolidinecarboxylateExample 28 Step fmethyl((1R)-2-oxo-1-phenyl-2-((2S)-2-(5-(4′-(2-((2S)-2-pyrrolidinyl)-1H-imidazol-5-yl)-4-biphenylyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)ethyl)carbamate

Step e: HATU (316.6 mg, 0.833 mmol) was added to a DMF (7.0 mL) solutionof pyrrolidine 28d (427 mg, 0.813 mmol), Cap-4 (177.6 mg, 0.849 mmol)and diisopropylethylamine (0.32 mL, 1.84 mmol), and the reaction mixturewas stirred for 45 minutes. The volatile component was removed in vacuo,and the residue was partitioned between CH₂Cl₂ (50 mL) and an aqueousmedium (20 mL H₂O+1 mL saturated NaHCO₃ solution). The aqueous phase wasre-extracted with CH₂Cl₂, and the combined organic phase was dried(MgSO₄), filtered, and concentrated in vacuo. The resulting yellow oilwas purified by flash chromatography (silica gel; ethyl acetate) toprovide 28e as a yellow foam (336 mg). LC (Cond. 1): RT=1.68 min; 91%homogeneity index; LC/MS: Anal. Calcd. for [M+H]⁺ C₄₁H₄₆N₇O₅: 716.35;found 716.53.

Step f: Carbamate 28e was elaborated to amine 28f by employing theprocedure described in the conversion of 1d to 1e. LC (Cond. 1): RT=1.49min; >98% homogeneity index. LC/MS: Anal. Calcd. for [M+H]⁺ C₃₆H₃₈N₇O₃:616.30; found 616.37; HRMS: Anal. Calcd. for [M+H]⁻ C₃₆H₃₈N₇O₃:616.3036; found 616.3046.

Example 28methyl((1R)-2-oxo-1-phenyl-2-((2S)-2-(5-(4′-(2-((2S)-1-(phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-4-biphenylyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)ethyl)carbamate

Amine 28f was converted to the TFA salt of Example 28 by employing thelast step of the synthesis of Example 1. ¹H NMR (DMSO-d₆, δ=2.5 ppm, 400MHz): δ 8.21-7.03 (m, 21H), 5.78-5.14 (3H), 3.98-3.13 (m, 9H; includesthe signal for OCH₃ at 3.54 & 3.53), 2.45-1.72 (m, 8H). LC (Cond. 1):RT=1.66 minutes, >98% homogeneity index; LC/MS: Anal. Calcd. for [M+H]⁺C₄₄H₄₄N₇O₄: 734.35; found 734.48; HRMS: Anal. Calcd. for [M+H]⁻C₄₄H₄₄N₇O₄: 734.3455; 734.3455.

Example 121(1R,1′R)-2,2′-((2,2′-dimethyl-4,4′-biphenyldiyl)bis(1H-imidazole-5,2-diyl(2S)-2,1-pyrrolidinediyl))bis(N,N-dimethyl-2-oxo-1-phenylethanamine)

Example 121 Step a-b

PdCl₂(Ph₃P)₂ (257 mg, 0.367 mmol) was added to a dioxane (45 mL)solution of 1-bromo-4-iodo-2-methylbenzene (3.01 g, 10.13 mmol) andtri-n-butyl(1-ethoxyvinyl)stannane (3.826 g, 10.59 mmol) and heated at80° C. for 17 hours. The reaction mixture was treated with water (15mL), cooled to ˜0° C. (ice/water), and then NBS (1.839 g, 10.3 mmol) wasadded in batches over 7 minutes. After about 25 minutes of stirring, thevolatile component was removed in vacuo, and the residue was partitionedbetween CH₂Cl₂ and water. The aqueous layer was extracted with CH₂Cl₂,and the combined organic phase was dried (MgSO₄), filtered, andconcentrated in vacuo. The resulting crude material was purified by agravity chromatography (silica gel; 4% ethyl acetate/hexanes)to providebromide 121a as a brownish-yellow solid (2.699 g); the sample is impureand contains stannane-derived impurities, among others. ¹H NMR (CDCl₃,δ=7.24, 400 MHz): 7.83 (s, 1H), 7.63 (s, 2H), 4.30 (s, 2H), 2.46 (s,3H).

A CH₃CN (15 mL) solution of 121a (2.69 g, <9.21 mmol) was added dropwiseover 3 minutes to a CH₃CN (30 mL) solution of (S)-Boc-proline (2.215 g,10.3 mmol) and triethylamine (1.40 mL, 10.04 mmol), and stirred for 90minutes. The volatile component was removed in vacuo, and the residuewas partitioned between water and CH₂Cl₂, and the organic phase wasdried (MgSO₄), filtered, and concentrated in vacuo. The resulting crudematerial was purified by a flash chromatography (silica gel; 15-20%ethyl acetate/hexanes) to provide 121b as a colorless viscous oil (2.74g). ¹H NMR (DMSO-d₆, δ=2.50, 400 MHz): δ 7.98 (m, 1H), 7.78 (d, J=8.3,1H), 7.72-7.69 (m, 1H), 5.61-5.41 (m, 2H), 4.35-4.30 (m, 1H), 3.41-3.30(m, 2H), 2.43 (s, 3H), 2.33-2.08 (m, 2H), 1.93-1.83 (m, 2H), 1.40/1.36(s, 9H); LC (Cond. 1): RT=1.91 min; >95% homogeneity index; LC/MS: Anal.Calcd. for [M+Na]⁺ C₁₉H₂₄BrNNaO₅ 448.07; found 448.10.

Additional keto-esters can be prepared in analogous fashion.

LC conditions: Condition 1: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% Bover 3 minutes, 1 minute hold time, A=90% water, 10% methanol, 0.1% TFA,B=10% water, 90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

Condition 2: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 2 minutes,1 minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water,90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

Example Structure Data 121b-1

RT = 2.15 minutes(condition 2, 98%);LRMS: Anal. Calcd. forC₁₇H₂₂NO₅399.07;found: 400.10 (M + H)⁺. 121b-2

RT = 2.78 minutes(condition 1, >90%);LRMS: Anal. Calcd. forC₂₀H₂₀³⁷BrNO₅ 435.05found: 458.02 (M + Na)⁺.

Example 121 Step c

A mixture of ketoester 121b (1.445 g, 3.39 mmol) and NH₄OAc (2.93 g,38.0 mmol) in xylenes (18 mL) was heated with a microwave at 140° C. for80 minutes. The volatile component was removed in vacuo, and the residuewas carefully partitioned between CH₂Cl₂ and water, where enoughsaturated NaHCO₃ solution was added to neutralize the aqueous medium.The aqueous phase was extracted with CH₂Cl₂, and the combined organicphase was dried (MgSO₄), filtered, and concentrated in vacuo. The crudeproduct was purified by a flash chromatography (silica gel, 40% ethylacetate/hexanes) to provide imidzaole 121c as an off-white solid (1.087g). ¹H NMR (DMSO-d₆, δ=2.50, 400 MHz): 12.15/11.91/11.84 (br s, 1H),7.72-7.24 (m, 4H), 4.78 (m, 1H), 3.52 (m, 1H), 3.38-3.32 (m, 1H), 2.35(s, 3H), 2.28-1.77 (m, 4H), 1.40/1.14 (s, 9H); LC (Cond. 1): RT=1.91min; >98% homogeneity index; LC/MS: Anal. Calcd. for [M+H]⁺ C₁₉H₂₅BrN₃O₂405.96; found 406.11.

Example 121 Step d

PdCl₂dppf.CH₂Cl₂ (50.1 mg, 0.061 mmol) was added to a pressure tubecontaining a mixture of bromide 121c (53 8.3 mg, 1.325 mmol),bis(pinacolato)diboron (666.6 mg, 2.625 mmol), potassium acetate (365.8mg, 3.727 mmol) and DMF (10 mL). The reaction mixture was flushed withN₂ and heated at 80° C. for 24.5 hours. The volatile component wasremoved in vacuo and the residue was partitioned between CH₂Cl₂ andwater, where enough saturated NaHCO₃ solution was added to make the pHof the aqueous medium neutral. The aqueous phase was extracted withCH₂Cl₂, and the combined organic phase was dried (MgSO₄), filtered, andconcentrated in vacuo. The resulting material was purified by a Biotagesystem (silica gel, 40-50% ethyl acetate/hexanes) to provide boronate121d as a white foam (580 mg). According to ¹H NMR the sample containsresidual pinacol in a product/pinacol ratio of ˜3. ¹H NMR (DMSO-d₆,δ=2.50, 400 MHz): δ 12.16/11.91/11.83 (br s, 1H), 7.63-7.25 (m, 4H),4.78 (m, 1H), 3.53 (m, 1H), 3.39-3.32 (m, 1H), 2.48/2.47 (s, 3H),2.28-1.78 (m, 4H), 1.40/1.14/1.12 (br s, 9H), 1.30 (s, 12H); LC (Cond.1): RT=1.62 min; LC/MS: Anal. Calcd. for [M+H]⁺ C₂₅H₃₇BN₃O₄ 454.29;found 454.15

Example 121 Step e and Example 121 Step f

Carbamate 121e was prepared from bromide 121c and boronate 121daccording to the preparation of dimer 1d; LC (Cond. 1): RT=1.43 min;LC/MS: Anal. Calcd. for [M+H]⁺ C₃₈H₄₉N₆O₄ 653.38; found 653.65.

The deprotection of carbamate 121e, according to the preparation ofpyrrolidine 1e, provided 121f as an off-white foam. ¹H NMR (DMSO-d₆,δ=2.50, 400 MHz): 11.79 (br s, 2H), 7.66 (s, 2H), 7.57 (d, J=7.8, 2H),7.41 (br s, 2H), 7.02 (d, J=7.8, 2H), 4.15 (app t, J=7.2, 2H), 3.00-2.94(m, 2H), 2.88-2.82 (m, 2H), 2.09-2.01 (m, 2H), 2.04 (s, 6H), 1.93-1.85(m, 2H), 1.82-1.66 (m, 4H). Note: although broad signals correspondingto the pyrrolidine NH appear in the 2.8-3.2 ppm region, the actual rangefor their chemical shift could not be determined. LC (Cond. 1): RT=1.03min; LC/MS: Anal. Calcd. for [M+H]⁺ C₂₈H₃₃N₆ 453.28; found 453.53

Example 121(1R,1′R)-2,2′-((2,2′-dimethyl-4,4′-biphenyldiyl)bis(1H-imidazole-5,2-diyl(2S)-2,1-pyrrolidinediyl))bis(N,N-dimethyl-2-oxo-1-phenylethanamine)

Example 121 (TFA salt) was synthesized from 121f according to thepreparation of Example 1 from 1e; LC (Cond. 1): RT=1.14 min; >98%homogeneity index; LC/MS: Anal. Calcd. for [M+H]⁺ C₄₈H₅₅N₈O₂ 775.45;775.75; HRMS: Anal. Calcd. for [M+H]⁺ C₄₈H₅₅N₈O₂ 775.4448; found775.4473

Examples 126-128

Example 126-128 were prepared starting from bromide 28b and boronate121d by using the methods described in Example 28 starting with step c.

RT (LC-Cond.); % homogeneity Example Compound Name

index; MS data 126 methyl((1R)-2-((2S)-2-(5-(4′-(2-((2S)-1-((2R)-2-(dimethylamino)-2-phenylacetyl)-2-pyrolidinyl)-1H-imidazol-5-yl)-2′-methyl-4-biphenylyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate

1.22 min (Cond. 1); >98%;LC/MS: Anal. Calcd. for[M + H]⁺ C₄₇H₅₁N₈O₄:791.40;found 791.70; HRMS: Anal.Calcd. for [M + H]⁺ C₄₇H₅₁N₈O₄:791.4033;found 791.4061 127 methyl((1R)-2-((2S)-2-(5-(2′-methyl-4′-(2-((2S)-1-(3-pyridinylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-4-biphenylyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate

1.19 minutes (Cond. 1); >98%;LC/MS: Anal. Calcd. for[M + H]⁺C₄₄H₄₅N₈O₄:749.36;found 749.62; HRMS: Anal.Calcd. for [M + H]⁺ C₄₄H₄₅N₈O₄:749.3564;found 749.3592 128 methyl((1R)-2-((2S)-2-(5-(2′-methyl-4′-(2-((2S)-1-((2S)-tetrahydro-2-furanylcarbonyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-4-biphenylyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate

1.27 minutes (Cond. 1); >98%;LC/MS: Anal. Calcd. for[M + H]⁺ C₄₂H₄₆N₇O₅:728.36;found 728.59; HRMS: Anal.Calcd. for [M + H]⁺ C₄₂H₄₆N₇O₅:728.3560;found 728.3593

Example 130(1R,1′R)-2,2′-((2-(trifluoromethyl)-4,4′-biphenyldiyl)bis(1H-imidazole-5,2-diyl(2S)-2,1-pyrrolidinediyl))bis(N,N-dimethyl-2-oxo-1-phenylethanamine)

Example 130 Step a

Glyoxal (2.0 mL of 40% in water) was added dropwise over 11 minutes to amethanol solution of NH₄OH (32 mL) and (S)-Boc-prolinal (8.564 g, 42.98mmol) and stirred at ambient temperature for 19 hours. The volatilecomponent was removed in vacuo and the residue was purified by a flashchromatography (silica gel, ethyl acetate) followed by arecrystallization (ethyl acetate, room temperature) to provide imidazole130a as a white fluffy solid (4.43 g). ¹H NMR (DMSO-d₆, δ=2.50, 400MHz): 11.68/11.59 (br s, 1H), 6.94 (s, 1H), 6.76 (s, 1H), 4.76 (m, 1H),3.48 (m, 1H), 3.35-3.29 (m, 1H), 2.23-1.73 (m, 4H), 1.39/1.15 (s, 9H).LC (Cond. 1): RT=0.87 min; >95% homogeneity index; LC/MS: Anal. Calcd.for [M+H]⁺ C₁₂H₂₀N₃O₂ 238.16; found 238.22. Imidazole 130a had an ee of98.9% when analyzed under chiral HPLC condition noted below.

-   Column: Chiralpak AD, 10 um, 4.6×50 mm-   Solvent: 1.7% ethanol/heptane (isocratic)-   Flow rate: 1 mL/min-   Wavelength: either 220 or 256 nm-   Relative retention time: 3.25 min (R), 5.78 minutes (S)

Example 130 Step b

N-Bromosuccinimide (838.4 mg, 4.71 mmol) was added in batches, over 15minutes, to a cooled (ice/water) CH₂Cl₂ (20 mL) solution of imidazole130a (1.0689 g, 4.504 mmol), and stirred at similar temperature for 75minutes. The volatile component was removed in vacuo. The crude materialwas purified by a reverse phase HPLC system (H₂O/methanol/TFA) toseparate bromide 130b from its dibromo-analog and the non-consumedstarting material. The HPLC elute was neutralized with excessNH₃/methanol and the volatile component was removed in vacuo. Theresidue was partitioned between CH₂Cl₂ and water, and the aqueous layerwas extracted with water. The combined organic phase was dried (MgSO₄),filtered, and concentrated in vacuo to provide 130b as a white solid(374 mg). ¹H NMR (DMSO-d₆, δ=2.50, 400 MHz): 12.12 (br s, 1H), 7.10 (m,1H), 4.70 (m, 1H), 3.31 (m, 1H; overlapped with water signal), 2.25-1.73(m, 4H), 1.39/1.17 (s, 3.8H+5.2H). LC (Cond. 1): RT=1.10 min; >95%homogeneity index; LC/MS: Anal. Calcd. for [M+H]⁺ C₁₂H₁₉BrN₃O₂ 316.07;found 316.10.

Example 130 Step c

Pd(Ph₃P)₄ (78.5 mg, 0.0679 mmol) was added to a mixture of bromide 130b(545 mg, 1.724 mmol),2-(4-chloro-3-(trifluoromethyl)phenyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane(542.8 mg, 1.771 mmol) (commercially available), NaHCO₃ (477 mg, 5.678mmol) in 1,2-dimethoxyethane (12.5 mL) and water (4.2 mL). The reactionmixture was purged with nitrogen, heated with an oil bath at 80° C. for27 hours, and then the volatile component was removed in vacuo. Theresidue was partitioned between CH₂Cl₂ and water, and the organic layerwas dried (MgSO₄), filtered, and concentrated in vacuo. The resultingcrude material was purified by a Biotage system (silica gel, 40-50%ethyl acetate/hexanes) followed by a reverse phase HPLC(water/methanol/TFA). The HPLC elute was treated with excessNH₃/methanol and concentrated. The residue was partitioned between waterand CH₂Cl₂, and the organic layer was dried (MgSO₄), filtered, andconcentrated in vacuo to provide 130c as a white foam (317.4 mg). ¹H NMR(DMSO-d₆, δ=2.50, 400 MHz): 12.36/12.09/12.03 (br s, 1H), 8.15 (d,J=1.8, 0.93H), 8.09 (br s, 0.07H), 8.01 (dd, J=8.3/1.3, 0.93H), 7.93 (m,0.07H), 7.74 (m, 1H), 7.66 (d, J=8.3, 0.93H), 7.46 (m, 0.07H), 4.80 (m,1H), 3.53 (m, 1H), 3.36 (m, 1H), 2.30-1.77 (m, 4h), 1.40/1.15 (s,3.8H+5.2H). LC (Cond. 1): RT=1.52 min; >95% homogeneity index; LC/MS:Anal. Calcd. for [M+H]⁺ C₁₉H₂₂ClF₃N₃O₂ 416.14; found 416.17.

Example 130 Step d-e

Pd[P(t-Bu)₃]₂ (48 mg, 0.094 mmol) was added to a mixture of chloride130c (245 mg, 0.589 mmol), boronate 1c (277.1 mg, 0.631 mmol), KF (106.7mg, 1.836 mmol) in DMF (6 mL), and heated at 110° C. for ˜30 hours. Thevolatile component was removed in vacuo, and the residue was partitionedbetween CH₂Cl₂ (50 mL), water (20 mL) and saturated NaHCO₃ (1 mL). Theaquous layer was extracted with CH₂Cl₂ (2×), and the combined organicphase was dried (MgSO₄), filtered, and concentrated in vacuo. Theresulting material was purified by a Biotage system (silica gel, ethylacetate) to provide carbamate 130d as an off-white foam (297 mg). LC(Cond. 1): RT=1.44 min; >95% homogeneity index; LC/MS: Anal. Calcd. for[M+H]⁺ C₃₇H₄₄F₃N₆O₄ 693.34; found 693.34.

The deprotection of 130d, which was conducted according to thepreparation of pyrrolidine 1e, provided 130e as a light yellow foam. ¹HNMR (DMSO-d₆, δ=2.50, 400 MHz): 11.88 (br s, 2H), 8.16 (d, J=1.5, 1H),8.02 (d, J=7.8, 1H), 7.78 (d, J=8.1, 2H), 7.66 (br s, 1H), 7.48 (br s,1H), 7.37 (d, J=8.1, 1H), 7.28 (d, J=8.3, 2H), 4.18 (m, 2H), 2.99-2.93(m, 2H), 2.89-2.83 (m, 2H), 2.11-2.01 (m, 2H), 1.94-1.85 (m, 2H),1.82-1.67 (m, 4H). Note: although broad signals corresponding to thepyrrolidine NH appear in the 2.8-3.2 ppm region, the actual range fortheir chemical shift could not be determined. LC (Cond. 1): RT=1.12min; >95% homogeneity index; LC/MS: Anal. Calcd. for [M+H]⁺ C₂₇H₂₈F₃N₆493.23; found 493.14.

Example 130(1R,1′R)-2,2′-((2-(trifluoromethyl)-4,4′-biphenyldiyl)bis(1H-imidazole-5,2-diyl(2S)-2,1-pyrrolidinediyl))bis(N,N-dimethyl-2-oxo-1-phenylethanamine)

Example 130 (TFA salt) was prepared from 130e and Cap-1 according to thepreparation of Example 1 from pyrrolidine 1e. LC (Cond. 1): RT=1.17min; >98% homogeneity index; LC/MS: Anal. Calcd. for [M+H]⁺ C₄₇H₅₀F₃N₈O₂815.40; found 815.44; HRMS: Anal. Calcd. for [M+H]⁺ C₄₇H₅₀F₃N₈O₂815.4009; found 815.4013

Example 131.1-1 to 131.1-2

Examples 131.1-1 through 131.1-2 were prepared in similar fashion toexample 28 via the intermediacy of intermediate 1-6e after appendingCap-4.

Example 131.1-1methyl((1R)-2-(((1S)-1-(5-(4′-(2-((2S)-1-((2R)-2-(dimethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-4-biphenylyl)-1H-imidazol-2-yl)ethyl)(methyl)amino)-2-oxo-1-phenylethyl)carbamate

Cap-1 was appended after the CBz carbamate was removed from 1-6e withPd/C/H₂.

LCMS conditions: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 3minutes, 1 minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10%water, 90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume. t_(R)=1.42min

LRMS: Anal. Calcd. for C₄₅H₄₉N₈O₄765.39; found: 765.38 (M+H)⁺.

HRMS: Anal. Calcd. for C₄₅H₄₉N₈O₄ Calcd 765.3877 found: 765.3905 (M+H)⁺.

Example 131.1-2methyl((1R)-2-(methyl((1S)-1-(5-(4′-(2-((2S)-1-((2R)-2-phenyl-2-(1-piperidinyl)acetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-4-biphenylyl)-1H-imidazol-2-yl)ethyl)amino)-2-oxo-1-phenylethyl)carbamate

Cap-14 was appended after the CBz carbamate was removed from 1-6e withPd/C/H₂.

LCMS conditions: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 3minutes, 1 minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10%water, 90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume. t_(R)=1.45min (>95%)

LRMS: Anal. Calcd. for C₄₈H₅₂N₈O₄ 805.42; found: 805.41 (M+H)⁺.

HRMS: Anal. Calcd. C₄₈H₅₂N₈O₄ Calcd 805.4190 found: 805.4214 (M+H)⁺.

Example 131.2(2R)-2-(dimethylamino)-N-methyl-2-phenyl-N-((1S)-1-(5-(4′-(2-((2S)-1-((2R)-2-phenyl-2-(1-piperidinyl)acetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-4-biphenylyl)-1H-imidazol-2-yl)ethyl)acetamide

Example 131.2 was prepared in similar fashion to example 131.1-1 andexample 131.1-2 via the intermediacy of intermediate 1-6e afterappending Cap-1. Cap-14 was appended after the CBz carbamate was removedwith Pd/C/H₂.

LCMS conditions: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 3minutes, 1 minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10%water, 90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume. t_(R)=1.28min

LRMS: Anal. Calcd. for C₄₈H₅₄N₈O₂ 775.44; found: 775.45 (M+H)⁺.

HRMS: Anal. Calcd. C₄₈H₅₄N₈O₂ Calcd 775.4448 found: 775.4460 (M+H)⁺.

Example 132(1R)-2-((2S)-2-(5-(6-(4-(2-((2S)-1-((2R)-2-(dimethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-3-pyridinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-N,N-dimethyl-2-oxo-1-phenylethanamine

Example 132 Step a-b

A CH₂Cl₂ (10 mL) solution of Br₂ (7.63 g, 47.74 mmol) was added-dropwise over 5 min to a cooled (ice/water) CH₂Cl₂ (105 mL) solution of1-(6-bromopyridine-3-yl)ethanone (9.496 g, 47.47 mmol) and 48% HBr (0.4mL). The cooling bath was removed 40 min later, and stirring wascontinued at ambient temperature for about 66 hr. The cake of solid thatformed was filtered, washed with CH₂Cl₂ and dried in vacuo to affordimpure 132a as an off-white solid (15.94 g).

Boc-L-proline (9.70 g, 45.06 mmol) was added in one batch to aheterogeneous mixture of crude 132a (15.4 g) and CH₃CN (150 mL), andimmediately afterward Et₃N (13.0 mL, 93.2 mmol) was added drop-wise over6 min. The reaction mixture was stirred for 50 min, the volatilecomponent was removed in vacuo and the residue was partitioned betweenCH₂Cl₂ and water. The CH₂Cl₂ layer was dried (MgSO₄), filtered andconcentrated in vacuo, and the resultant material was purified by flashchromatography (silica gel; sample was loaded with eluting solvent; 25%EtOAc/hexanes) to afford 132b as a highly viscous yellow oil (11.44 g).¹H NMR (DMSO, δ=2.5 ppm; 400 MHz): 8.95 (m, 1H), 8.25-8.21 (m, 1H), 7.88(d, J=8.3, 1H), 5.65-5.46 (m, 2H), 4.36-4.31 (m, 1H), 3.41-3.29 (m, 2H),2.36-2.22 (m, 1H), 2.14-2.07 (m, 1H), 1.93-1.83 (m, 2H), 1.40 & 1.36(two s, 9H).

LC (Cond. 1): RT=2.01 min; >90% homogeneity index

LC/MS: Anal. Calcd. for [M+Na]⁺ C₁₇H₂₁NaBrN₂O₅: 435.05; found 435.15

HRMS: Anal. Calcd. for [M+H]⁺ C₁₇H₂₂BrN₂O₅: 413.0712; found 413.0717

Example 132 Step c

A mixture of ketoester 132b (1.318 g, 3.19 mmol) and NH₄OAc (2.729 g,35.4 mmol) in xylenes (18 mL) was heated with a microwave at 140° C. for90 min. The volatile component was removed in vacuo and the residue waspartitioned between CH₂Cl₂ and water, where enough saturated NaHCO₃solution was added to neutralize the aqueous medium. The aqueous phasewas extracted with CH₂Cl₂, and the combined organic phase was dried(MgSO₄), filtered, and concentrated in vacuo. The resulting crudematerial was purified by a Biotage system (silica gel; 50%EtOAc/hexanes) to afford imidazole 132c as an off-white foam (1.025 g).¹H NMR (DMSO, δ=2.5 ppm, 400 MHz): 12.33/12.09/12.02 (br m, 1H), 8.74(d, J=2.3, 0.93H), 8.70 (app br s, 0.07H), 8.03/7.98 (dd for the firstpeak, J=8.3, 1H), 7.69/7.67 (br m, 1H), 7.58/7.43 (d for the first peak,J=8.3, 1H), 4.80 (m, 1H), 3.53 (m, 1H), 3.36 (m, 1H), 2.33-2.11 (m, 1H),2.04-1.79 (m, 3H), 1.39/1.15 (app br s, 3.9H+5.1H).

LC (Cond.1): RT=1.52 min; >98% homogeneity index

LC/MS: Anal. Calcd. for [M+H]⁺ C₁₇H₂₂BrN₄O₂: 393.09; found 393.19

HRMS: Anal. Calcd. for [M+H]⁺ C₁₇H₂₂BrN₄O₂: 393.0926; found 393.0909

Example 132 Step d-e

Pd(Ph₃P)₄ (115.1 mg, 0.10 mmol) was added to a mixture of bromide 132c(992 mg, 2.52 mmol), boronate 1c (1.207 g, 2.747 mmol), NaHCO₃ (698.8mg, 8.318 mmol) in 1,2-dimethoxyethane (18 mL) and water (4 mL). Thereaction mixture was flushed with nitrogen, heated with an oil bath at90° C. for 37 hr and allowed to cool to ambient temperature. Thesuspension that formed was filtered and washed with water followed by1,2-dimethoxyethane, and dried in vacuo. A silica gel mesh was preparedfrom the crude solid and submitted to flash chromatography (silica gel;EtOAc) to afford carbamate 132d as a white solid, which yellowedslightly upon standing at ambient conditions (1.124 g). ¹H NMR indicatedthat the sample contains residual MeOH in a product/MeOH mole ratio of1.3.

LC (Cond. 1): RT=1.71 min; >98% homogeneity index

LC/MS: Anal. Calcd. for [M+H]⁺ C₃₅H₄₄N₇O₄: 626.35; found 626.64

HRMS: Anal. Calcd. for [M+H]⁺ C₃₅H₄₄N₇O₄: 626.3455; 626.3479

Carbamate 132d (217 mg) was treated with 25% TFA/CH₂Cl₂ (3.6 mL) andstirred at ambient condition for 6 hr. The volatile component wasremoved in vacuo, and the resultant material was free based by MCXcolumn (MeOH wash; 2.0 M NH₃/MeOH elution) to afford 132e as a dullyellow foam that solidified gradually upon standing (150.5 mg; mass isabove theoretical yield). ¹H NMR (DMSO, δ=2.5 ppm; 400 MHz): 11.89 (verybroad, 2H), 9.01 (d, J=1.8, 1H), 8.13 (dd, J=8.3, 2.2, 1H), 8.07 (d,J=8.6, 2H), 7.92 (d, J=8.3, 1H), 7.83 (d, J=8.5, 2H), 7.61 (br s, 1H),7.50 (br s, 1H), 4.18 (m, 2H), 3.00-2.93 (m, 2H), 2.90-2.82 (m, 2H),2.11-2.02 (m, 2H), 1.94-1.85 (m, 2H), 1.83-1.67 (m, 4H). [Note: theexchangeable pyrrolidine hydrogens were not observed]

LC (Cond. 1): RT=1.21 min; >98% homogeneity index

LC/MS: Anal. Calcd. for [M+H]⁺ C₂₅H₂₈N₇: 426.24; found 426.40

HRMS: Anal. Calcd. for [M+H]⁺ C₂₅H₂₈N₇: 426.2406; found 426.2425

Example 132(1R)-2-((2S)-2-(5-(6-(4-(2-((2S)-1-((2R)-2-(dimethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-3-pyridinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-N,N-dimethyl-2-oxo-1-phenylethanamine

HATU (41.4 mg, 0.109 mmol) was added to a mixture of pyrrolidine 132e(23.1 mg, 0.054 mmol), (i-Pr)₂EtN (40 μL, 0.23 mmol) and Cap-1 (25.3 mg,0.117 mmol) in DMF (1.5 mL), and the mixture was stirred at ambient for1 hr. The volatile component was removed in vacuo, and the residue waspurified first by MCX (MeOH wash; 2.0 M NH₃/MeOH elution) and then by areverse phase HPLC (H₂O/MeOH/TFA) to afford the TFA salt of Example 132as a yellow foam (39.2 mg).

LC (Cond. 1): RT=1.37 min; >98% homogeneity index

LC/MS: Anal. Calcd. for [M+H]⁺ C₄₅H₅₀N₉O₂: 748.41; found 748.53

HRMS: Anal. Calcd. for [M+H]⁺ C₄₅H₅₀N₉O₂: 748.4087; found 748.4090

Example 133-135 were prepared as TFA salts from 132e by using the samemethod of preparations as Example 132 and appropriate reagents.

Example 133-135

Example Compound Name

RT (LC-Cond.); %homogeneity index;MS data 133(1R)-2-((2S)-2-(5-(6-(4-(2-((2S)-1-((2R)-2-hydroxy-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-3-pyridinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethanol

1.49 min (Cond. 1); >98%LC/MS: Anal. Calcd. for[M + H]⁺C₄₁H₄₀N₇O₄:694.31; found 694.42HRMS: Anal. Calcd. for[M + H]⁺C₄₁H₄₀N₇O₄:694.3142, found: 694.3164 134 methyl((1R)-2-((2S)-2-(5-(6-(4-(2-((2S)-1-((2R)-2-((methoxycarbonyl)amino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-3-pyridinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate

1.60 min (Cond. 1); >98%LC/MS: Anal. Calcd. for[M + H]⁺C₄₅H₄₆N₉O₆:808.36; found 808.51HRMS: Anal. Calcd. for[M + H]⁺C₄₅H₄₆N₉O₆:808.3571; found 808.3576 1355-(2-((2S)-1-((2R)-2-methoxy-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-(4-(2-((2S)-1-((2R)-2-methoxy-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)pyridine

1.60 min (Cond. 1); >98%LC/MS: Anal. Calcd. for[M + H]⁺C₄₃H₄₄N₇O₄:722.35; found 722.40HRMS: Anal. Calcd. for[M + H]⁺C₄₃H₄₄N₇O₄:722.3455; found 722.3464

Example 136(1R)-2-((2S)-2-(5-(6-(4-(2-((2S)-1-((2R)-2-(dimethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-methylphenyl)-3-pyridinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-N,N-dimethyl-2-oxo-1-phenylethanamine

Example 136 Steps a and b

PdCl₂(Ph₃P)₂ (257 mg, 0.367 mmol) was added to a dioxane (45 mL)solution of 1-bromo-4-iodo-2-methylbenzene (3.01 g, 10.13 mmol) andtri-n-butyl(1-ethoxyvinyl)stannane (3.826 g, 10.59 mmol) and heated at80° C. for 17 hr. The reaction mixture was treated with water (15 mL),cooled to ˜0° C. (ice/water), and then NBS (1.839 g, 10.3 mmol) wasadded in batches over 7 min. About 25 min of stirring, the volatilecomponent was removed in vacuo, and the residue was partitioned betweenCH₂Cl₂ and water. The aqueous layer was extracted with CH₂Cl₂, and thecombined organic phase was dried (MgSO₄), filtered, and concentrated invacuo. The resulting crude material was purified by a gravitychromatography (silica gel; 4% EtOAc/hexanes) to afford bromide 136a asa brownish-yellow solid (2.699 g); the sample is impure and containsstannane-derived impurities, among others. ¹H NMR (CDCl₃, δ=7.24, 400MHz): 7.83 (s, 1H), 7.63 (s, 2H), 4.30 (s, 2H), 2.46 (s, 3H).

An CH₃CN (15 mL) solution of 136a (2.69 g, <9.21 mmol) was added dropwise over 3 min to a CH₃CN (30 mL) solution of (S)-Boc-proline (2.215 g,10.3 mmol) and Et₃N (1.40 mL, 10.04 mmol), and stirred for 90 min. Thevolatile component was removed in vacuo, and the residue was partitionedbetween water and CH₂Cl₂, and the organic phase was dried (MgSO₄),filtered, and concentrated in vacuo. The resultant crude material waspurified by a flash chromatography (silica gel; 15-20% EtOAc/hexanes) toafford 136b as a colorless viscous oil (2.74 g). ¹H NMR (DMSO-d₆,δ=2.50, 400 MHz): 7.98 (m, 1H), 7.78 (d, J=8.3, 1H), 7.72-7.69 (m, 1H),5.61-5.41 (m, 2H), 4.35-4.30 (m, 1H), 3.41-3.30 (m, 2H), 2.43 (s, 3H),2.33-2.08 (m, 2H), 1.93-1.83 (m, 2H), 1.40/1.36 (s, 9H).

LC (Cond. 1): RT=1.91 min; >95% homogeneity index

LC/MS: Anal. Calcd. for [M+Na]⁺ C₁₉H₂₄BrNNaO₅ 448.07; found 448.10

Example 136 Step c

A mixture of ketoester 136b (1.445 g, 3.39 mmol) and NH₄OAc (2.93 g,38.0 mmol) in xylenes (18 mL) was heated with a microwave at 140° C. for80 min. The volatile component was removed in vacuo, and the residue wascarefully partitioned between CH₂Cl₂ and water, where enough saturatedNaHCO₃ solution was added to neutralize the aqueous medium. The aqueousphase was extracted with CH₂Cl₂, and the combined organic phase wasdried (MgSO₄), filtered, and concentrated in vacuo. The crude waspurified by a flash chromatography (silica gel, 40% EtOAc/hexanes) toafford imidazole 136c as an off-white solid (1.087 g). ¹H NMR (DMSO-d₆,δ=2.50, 400 MHz): 12.15/11.91/11.84 (br s, 1H), 7.72-7.24 (m, 4H), 4.78(m, 1H), 3.52 (m, 1H), 3.38-3.32 (m, 1H), 2.35 (s, 3H), 2.28-1.77 (m,4H), 1.40/1.14 (s, 9H).

LC (Cond. 1): RT=1.91 min; >98% homogeneity index

LC/MS: Anal. Calcd. for [M+H]⁺ C₁₉H₂₅BrN₃O₂ 405.96; found 406.11

Example 136 Step d

PdCl₂dppf.CH₂Cl₂ (50.1 mg, 0.061 mmol) was added to a pressure tubecontaining a mixture of bromide 136c (538.3 mg, 1.325 mmol),bis(pinacolato)diboron (666.6 mg, 2.625 mmol), KOAc (365.8 mg, 3.727mmol) and DMF (10 mL). The reaction mixture was flushed with N₂ andheated at 80° C. for 24.5 hr. The volatile component was removed invacuo and the residue was partitioned between CH₂Cl₂ and water, whereenough saturated NaHCO₃ solution was added to make the pH of the aqueousmedium neutral. The aqueous phase was extracted with CH₂Cl₂, and thecombined organic phase was dried (MgSO₄), filtered, and concentrated invacuo. The resulting material was purified by a Biotage system (silicagel, 40-50% EtOAc/hexanes) to afford boronate 136d as a white foam (580mg). According to ¹H NMR the sample contains residual pinacol in aproduct/pinacol ratio of ˜3. ¹H NMR (DMSO-d₆, δ=2.50, 400 MHz):12.16/11.91/11.83 (br s, 1H), 7.63-7.25 (m, 4H), 4.78 (m, 1H), 3.53 (m,1H), 3.39-3.32 (m, 1H), 2.48/2.47 (s, 3H), 2.28-1.78 (m, 4H),1.40/1.14/1.12 (br s, 9H), 1.30 (s, 12H).

LC (Cond. 1): RT=1.62 min

LC/MS: Anal. Calcd. for [M+H]⁺ C₂₅H₃₇BN₃O₄ 454.29; found 454.15

Example 136 Step e-f

Biaryl 136e was prepared from bromide 132c and boronate 136d accordingto the coupling condition described for the preparation of biaryl 132d.

LC (Cond. 1a): RT=1.32 min; >90% homogeneity index

LC/MS: Anal. Calcd. for [M+H]⁺ C₃₆H₄₅N₇O₄ 640.36; found 640.66

The deprotection of biaryl 136e was done according to the preparation ofpyrrolidine 132e to afford 136f as a light yellow foam. ¹H NMR (DMSO-d₆,δ=2.50, 400 MHz): 11.88 (br s, 2H), 9.02 (d, J=2, 1H), 8.12 (dd, J=8.4,2.3, 1H), 7.67 (s, 1H), 7.64-7.62 (m, 2H), 7.50 (d, J=8.3, 1H), 7.46 (brs, 1H), 7.40 (d, J=7.8, 1H), 4.21-4.14 (m, 2H), 3.00-2.93 (m, 2H),2.90-2.82 (m, 2H), 2.40 (s, 3H), 2.11-2.01 (m, 2H), 1.94-1.85 (m, 2H),1.82-1.66 (m, 4H). [Note: the signal for the pyrrolidine NH appears inthe region 3.22-2.80 and is too broad to make a chemical shiftassignment.]

LC (Cond. 1): RT=0.84 min

LC/MS: Anal. Calcd. for [M+H]⁺ C₂₆H₃₀N₇ 440.26; found 440.50

Example 136(1R)-2-((2S)-2-(5-(6-(4-(2-((2S)-1-((2R)-2-(dimethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-methylphenyl)-3-pyridinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-N,N-dimethyl-2-oxo-1-phenylethanamine

Example 136 (TFA salt) was synthesized from 136f according to thepreparation of Example 132 from 132e.

1.05 min (Cond. 1); >98%

LC/MS: Anal. Calcd. for [M+H]⁺ C₄₆H₅₂N₉O₂: 762.42, found: 762.77

HRMS: Anal. Calcd. for [M+H]⁺ C₄₆H₅₂N₉O₂: 762.4244; found 762.4243

Example 138methyl((1R)-2-((2S)-2-(5-(6-(4-(2-((2S)-1-((2R)-2-((methoxycarbonyl)amino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-methylphenyl)-3-pyridinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate

Example 138 was prepared similarly from pyrrolidine 136f and Cap-4.

1.60 min (Cond. 1); >98%

LC/MS: Anal. Calcd. for [M+H]⁺ C₄₆H₄₈N₉O₆: 822.37; found 822.74

HRMS: Anal. Calcd. for [M+H]⁺ C₄₆H₄₈N₉O₆: 822.3728; found 822.3760

Example 139N-((1R)-2-((2S)-2-(5-(6-(4-(2-((2S)-1-((2R)-2-acetamido-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-3-pyridinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)acetamide

Example 139 Step a

HATU (99.8 mg, 0.262 mmol) was added to a mixture of 132e (54.1 mg,0.127 mmol), (R)-2-(t-butoxycarbonylamino)-2-phenylacetic acid (98.5 mg,0.392 mmol) and i-Pr₂EtN (100 μL, 0.574 mol), and the reaction mixturewas stirred for 70 min. The volatile component was removed in vacuo, andthe residue was purified by a reverse phase HPLC (H₂O/MeOH/TFA), wherethe HPLC elute was treated with excess 2.0 N NH₃/MeOH before the removalof the volatile component in vacuo. The resulting material waspartitioned between CH₂Cl₂ and water, and the aqueous phase wasextracted with CH₂Cl₂ (2×). The combined organic phase was dried(MgSO₄), filtered, and concentrated in vacuo. Carbamate 139a wasobtained as a white film of foam (82.3 mg).

LC (Cond. 1): RT=1.97 min; >95% homogeneity index.

LC/MS: Anal. Calcd. for [M+H]⁺ C₅₁H₅₈N₉O₆: 892.45; found 892.72

Example 139b Step b

Carbamate 139a was deprotected to amine 139b by using the proceduredescribed for the preparation of pyrrolidine 132e from 132d.

LC (Cond. 1): RT=1.37 min; >95% homogeneity index

LC/MS: Anal. Calcd. for [M+H]⁺ C₄₁H₄₂N₉O₂: 692.35; found 692.32

Example 139N-((1R)-2-((2S)-2-(5-(6-(4-(2-((2S)-1-((2R)-2-acetamido-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-3-pyridinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)acetamide

Acetic anhydride (20 μL, 0.212 mmol) was added to a DMF (1.5 mL)solution of 139b (31.2 mg, 0.045 mmol), and the reaction mixture wasstirred for 1 hr. NH₃/MeOH (1.0 mL of 2N) was added to the reactionmixture and stirring continued for 100 min. The volatile component wasremoved in vacuo and the resulting crude material was purified by areverse phase HPLC (H₂O/MeOH/TFA) to afford the TFA salt of Example 139as a light yellow solid (24.1 mg).

LC (Cond. 1): RT=1.53 min; >98% homogeneity index

LC/MS: Anal. Calcd. for [M+H]⁺ C₄₅H₄₆N₉O₄: 776.37; found 776.38

HRMS: Anal. Calcd. for [M+H]⁺ C₄₅H₄₆N₉O₄: 776.3673; found 776.3680

Example 140methyl((1R)-2-((2S)-2-(5-(4-(5-(2-((2S)-1-((2R)-2-(dimethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyridinyl)phenyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate

Example 140 Step a

HATU (19.868 g, 52.25 mmol) was added to a heterogeneous mixture ofN-Cbz-L-proline (12.436 g, 49.89 mmol) and the HCl salt of2-amino-1-(4-bromophenyl)ethanone (12.157 g, 48.53 mmol) in DMF (156mL). The mixture was lowered in an ice-water bath, and immediatelyafterward N,N-diisopropylethylamine (27 mL, 155 mmol) was added dropwise to it over 13 min. After the addition of the base was completed,the cooling bath was removed and the reaction mixture was stirred for anadditional 50 min. The volatile component was removed in vacuo; water(125 mL) was added to the resultant crude solid and stirred for about 1hr. The off-white solid was filtered and washed with copious water, anddried in vacuo to afford ketoamide 140a as a white solid (20.68 g). ¹HNMR (DMSO-d₆, δ=2.5 ppm, 400 MHz): 8.30 (m, 1H), 7.91 (m, 2H), 7.75 (d,J=8.5, 2H), 7.38-7.25 (m, 5H), 5.11-5.03 (m, 2H), 4.57-4.48 (m, 2H),4.33-4.26 (m, 1H), 3.53-3.36 (m, 2H), 2.23-2.05 (m, 1H), 1.94-1.78 (m,3H).

LC (Cond. 1): RT=1.65 min; 98% homogeneity index

LC/MS: Anal. Calcd. for [M+H]⁺ C₂₁H₂₂BrN₂O₄: 445.08; found 445.31

Example 140 Step b

Ketoamide 140a (10.723 g, 24.08 mmol) was converted to 140b according tothe procedure described for the synthesis of carbamate 132c, with theexception that the crude material was purified by flash chromatography(silica gel; 50% EtOAc/hexanes). Bromide 140b was retrieved as anoff-white foam (7.622 g). ¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz):12.23/12.04/11.97 (m, 1H), 7.73-6.96 (m, 10H), 5.11-4.85 (m, 3H), 3.61(m, 1H), 3.45 (m, 1H), 2.33-184(m, 4H).

LC (Cond.1): RT=1.42 min; >95% homogeneity index

LC/MS: Anal. Calcd. for [M+H]⁺ C₂₁H₂₁BrN₃O₂: 426.08; found 426.31

HRMS: Anal. Calcd. for [M+H]⁺ C₂₁H₂₁BrN₃O₂: 426.0817; found: 426.0829

The optical purity of 140b was assessed using the following chiral HPLCmethods, and an ee of 99% was observed.

-   Column: Chiralpak AD, 10 um, 4.6×50 mm-   Solvent: 20% ethanol/heptane (isocratic)-   Flow rate: 1 ml/min-   Wavelength: 254 nm-   Relative retention time: 1.82 min (R), 5.23 min (S)

Example 140 Step c

Pd(Ph₃P)₄ (208 mg, 0.180 mmol) was added to a pressure tube containing amixture of bromide 140b (1.80 g, 4.22 mmol), bis(pinacolato)diboron(2.146 g, 8.45 mmol), KOAc (1.8 g, 11.0 mmol) and 1,4-dioxane (34 mL).The reaction flask was purged with nitrogen, capped and heated with anoil bath at 80° C. for 23 hr. The volatile component was removed invacuo, and the residue was partitioned carefully between CH₂Cl₂ (70 mL)and an aqueous medium (22 mL water+5 mL saturated NaHCO₃ solution). Theaqueous layer was extracted with CH₂Cl₂, and the combined organic phasewas dried (MgSO₄), filtered, and concentrated in vacuo. The oily residuewas crystallized from EtOAc/hexanes to afford two crops of boronate 140cas a yellow solid (1.52 g). The mother liquor was evaporated in vacuoand the resulting material was purified by flash chromatography (silicagel; 20-35% EtOAc/CH₂Cl₂) to afford additional 140c as an off-whitesolid, containing residual pinacol (772 mg).

LC (Cond. 1): RT=1.95 min

LC/MS: Anal. Calcd. for [M+H]⁺ C₂₇H₃₃BN₃O₄: 474.26; found 474.31

Example 140 Steps d-e

Arylbromide 132c was coupled with boronate 140c to afford 140d by usingthe same procedure described for the synthesis of biaryl 132d. Thesample contains the desbromo version of 132c as an impurity. Proceededto the next step without further purification.

LC (Cond. 1): RT=1.72 min; ˜85% homogeneity index

LC/MS: Anal. Calcd. for [M+H]⁺ C₃₈H₄₂N₇O₄: 660.33; found 660.30

A mixture of 10% Pd/C (226 mg), biaryl 140d (1.25 g) and MeOH (15 mL)was stirred under a balloon of hydrogen for ˜160 hr, where the hydrogensupply was replenished periodically as needed. The reaction mixture wasfiltered through a pad of diatomaceous earth (Celite®), and the filtratewas evaporated in vacuo to afford crude 140e as a yellowish-brown foam(911 mg). Proceeded to the next step without further purification.

LC (Cond. 1): RT=1.53 min

LC/MS: Anal. Calcd. for [M+H]⁺ C₃₀H₃₆N₇O₂: 526.29; found 526.23

Example 140 Steps f-g

Pyrrolidine 140 g was prepared from 140e and Cap-4, via the intermediacyof carbamate 140f, by sequentially employing the amide forming andBoc-deprotection protocols used in the synthesis of Example 132.

LC (Cond. 1): RT=1.09 min; ˜94% homogeneity index

LC/MS: Anal. Calcd. for [M+H]⁺ C₃₅H₃₇N₈O₃: 617.30; found 617.38

Example 140methyl((1R)-2-((2S)-2-(5-(4-(5-(2-((2S)-1-((2R)-2-(dimethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyridinyl)phenyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate

The TFA salt of Example 140 was synthesized from pyrrolidine 140 g andCap-1 by using the procedure described for the preparation of Example132 from intermediate 132e.

1.15 min (Cond. 1); >98% homogeneity index

LC/MS: Anal. Calcd. for [M+H]⁺ C₄₅H₄₀N₇O₄: 778.38; found 778.48

HRMS: Anal. Calcd. for [M+H]⁺ C₄₅H₄₀N₇O₄: 778.3829; found 778.3849

The TFA salt of Example 141-143 were synthesized from intermediate 140 gand appropriate reagents in a similar manner.

Examples 141-143

Example Compound Name

RT (LC-Cond.): %homogeneity index;MS data 141 methyl((1R)-2-oxo-1-phenyl-2-((2S)-2-(5-(4-(5-(2-((2S)-1-((2R)-tetrahydro-2-furanylcarbonyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyridinyl)phenyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)ethyl)carbamate

1.15 min (Cond. 1); >98%LC/MS: Anal. Calcd. for[M + H]⁺C₄₀H₄₃N₈O₅:715.34; found 715.44HRMS: Anal. Calcd. for[M + H]⁺C₄₀H₄₃N₈O₅:715.3356; found 715.3381 142 methyl((1R)-2-((2S)-2-(5-(4-(5-(2-((2S)-1-((1-methyl-4-piperidinyl)carbonyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyridinyl)phenyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate

1.07 min (Cond. 1); >98%LC/MS: Anal. Calcd. for[M + H]⁺C₄₂H₄₈N₉O₄:742.38; found 742.48HRMS: Anal. Calcd. for[M + H]⁺C₄₂H₄₈N₉O₄:742.3829; found 742.3859 143 methyl((1R)-2-oxo-1-phenyl-2-((2S)-2-(5-(4-(5-(2-((2S)-1-(3-pyridinylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyridinyl)phenyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)ethyl)carbamate

1.09 min (Cond. 1); >98%LC/MS: Anal. Calcd. for[M + H]⁺C₄₂H₄₂N₉O₄:736.34; found 736.44HRMS: Anal. Calcd. for[M + H]⁺C₄₂H₄₂N₉O₄:736.3360; 736.3344

Example 144methyl((1R)-2-((2S)-2-(5-(4-(5-(2-((2S)-1-(4-morpholinylcarbonyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyridinyl)phenyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate

A DMF (1.5 mL) solution of morpholine-4-carbonyl chloride (8.5 mg, 0.057mmol) was added to a mixture of i-Pr₂EtN (20 μL, 0.115 mmol) and 140 g(27.3 mg, 0.044 mmol), and stirred for 100 min. The volatile componentwas removed in vacuo and the residue was purified by a reverse phaseHPLC (H₂O/MeOH/TFA) to afford the TFA salt of Example 144 as a yellowfoam (34.6 mg).

1.17 min (Cond. 1); >98%

LC/MS: Anal. Calcd. for [M+H]⁺ C₄₀H₄₄N₉O₅: 730.35; found 730.42

HRMS: Anal. Calcd. for [M+H]⁺ C₄₀H₄₄N₉O₅: 730.3465; found 730.3477

Example 145dimethyl(2,2′-bipyridine-5,5′-diylbis(1H-imidazole-5,2-diyl(2S)-2,1-pyrrolidinediyl((1R)-2-oxo-1-phenyl-2,1-ethanediyl)))biscarbamate

Example 145 Step a-b

Pd(Ph₃P)₄ (9.6 mg, 0.008 mmol) and LiCl (28 mg, 0.67 mmol) were added toa mixture of arylbromide 132c (98.7 mg, 0.251 mmol) and hexamethylditin(51.6 mg, 0.158 mmol), and heated at 80° C. for ˜3 days. The volatilecomponent was removed in vacuo and the resultant crude material waspurified by flash chromatography (silica gel; 0-10% MeOH/EtOAc) followedby a reverse phase HPLC (H₂O/MeOH/TFA). The HPLC elute was neutralizedwith excess 2.0 N NH₃/MeOH, and the volatile component was removed invacuo. The residue was partitioned between CH₂Cl₂ and water, and theaqueous phase was washed with CH₂Cl₂ (2×). The combined organic phasewas dried (MgSO₄), filtered, and concentrated in vacuo to affordcarbamate 145a as a film of oil (8.7 mg).

LC (Cond. 1): RT=1.68 min; >98% homogeneity index

LC/MS: Anal. Calcd. for [M+H]⁺ C₃₄H₄₃N₈O₄: 627.34; found 627.47

Carbamate 145a was elaborated to pyrrolidine 145b according to thepreparation of 132e from 132d. ¹H NMR (DMSO, δ=2.5 ppm; 400 MHz): 12.02(br signal, 2H), 9.04 (d, J=1.6, 2H), 8.34 (d, J=8.3, 2H), 8.20 (dd,J=8.3, 2.3, 2H), 7.67 (br s, 1H), 4.21 (m, 2H), 3.00-2.85 (m, 4H),2.12-2.04 (m, 2H), 1.95-1.68 (m, 6H). [Note: the pyrrolidine-NH signalwas not observed].

LC (Cond.1): RT=1.17 min; >98% homogeneity index

LC/MS: Anal. Calcd. for [M+H]⁺ C₂₄H₂₇N₈: 427.24; found 427.13

Example 145dimethyl(2,2′-bipyridine-5,5′-diylbis(1H-imidazole-5,2-diyl(2S)-2,1-pyrrolidinediyl((1R)-2-oxo-1-phenyl-2,1-ethanediyl)))biscarbamate

Example 145 (TFA salt) was synthesized from 145b according to thepreparation of Example 132 from 132e.

LC (Cond. 1): RT=1.63 min; 98% homogeneity index

LC/MS: Anal. Calcd. for [M+H]⁺ C₄₄H₄₅N₁₀O₆: 809.35; found 809.40

Example 146(1R)-2-((2S)-2-(5-(5-(4-(2-((2S)-1-((2R)-2-(dimethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-2-pyridinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-N,N-dimethyl-2-oxo-1-phenylethanamine

Example 146 Step a

n-BuLi (12.0 mL of 2.5M/hexanes, 30 mmol) was added drop-wise over 15min to a cooled (−78° C.) toluene (300 mL) semi-solution of2,5-dibromopyridine (6.040 g, 25.5 mmol), and stirred for 2.5 hr.t-Butyl 2-(methoxy(methyl)amino)-2-oxoethylcarbamate (2.809 g, 12.87mmol) was added in batches over 7 min, and stirring continued for 1.5 hrat −78° C. The −78° C. bath was replaced with −60° C. bath, which wasallowed to warm up to −15° C. over 2.5 hr. The reaction was quenchedwith saturated NH₄Cl solution (20 mL), and the mixture was allowed tothaw to ambient temperature and the organic layer was separated andevaporated in vacuo. The resulting crude material was purified by flashchromatography (silica gel; 15% EtOAc/hexanes) to afford a reddish brownsemisolid, which was washed with hexanes to removed the colored residue.Pyridine 146a was retrieved as an ash colored solid (842 mg). ¹H NMR(DMSO, δ=2.5 ppm; 400 MHz): 8.89 (d, J=2.3, 1H), 8.30 (dd, J=8.4, 2.4,1H), 7.90 (d, J=8.3, 1H), 7.03(br t, J=5.7; 0.88H), 6.63 (app br s,0.12H), 4.55 (d, J=5.8, 2H), 1.40/1.28 (two app s, 7.83H+1.17H).

LC (Cond. 1): RT=2.00 min; >95% homogeneity index

LC/MS: Anal. Calcd. for [M+Na]⁺ C₁₂H₁₅BrNaN₂O₃: 337.02; found 337.13

Example 146 Step b

48% HBr (1.0 mL) was added drop-wise to a dioxane (5.0 mL) solution ofcarbamate 146a (840 mg, 2.66 mmol) over 3 min, and the reaction mixturewas stirred at ambient temperature for 17.5 hr. The precipitate wasfiltered and washed with dioxane, and dried in vacuo to afford amine theHBr salt of 146b as an off-white solid (672.4 mg; the exact moleequivalent of the HBr salt was not determined). ¹H NMR (DMSO, δ=2.5 ppm;400 MHz): 8.95 (d, J=2.3, 1 H), 8.37 (dd, J=8.4, 2.3, 1H), 8.2 (br s,3H), 8.00 (d, J=8.3, 1H), 4.61 (s, 2H).

LC (Cond. 1): RT=0.53 min

LC/MS: Anal. Calcd. for [M+H]⁺ C₇H₈BrN₂O: 214.98; found 215.00

Example 146 Step c

i-Pr₂EtN (2.3 mL, 13.2 mmol) was added drop-wise over 15 min to aheterogonous mixture of amine 146b (1.365 g), (S)-Boc-proline (0.957 g,4.44 mmol) and HATU (1.70 g, 4.47 mmol) in DMF (13.5 mL), and stirred atambient temperature for 1 hr. The volatile component was removed invacuo and the residue was partitioned between EtOAc (40 mL) and anaqueous medium (20 mL water+1 ml saturated NaHCO₃ solution). The aqueouslayer was washed with EtOAc (20 mL), and the combined organic phase wasdried (MgSO₄), filtered, and concentrated in vacuo. The resultant crudematerial was purified by flash chromatography (silica gel; 40-50%EtOAc/hexanes) to afford ketoamide 146c as a faint-yellow foam (1.465g). ¹H NMR (DMSO, δ=2.5 ppm; 400 MHz): 8.90 (d, J=2.3, 1H), 8.30 (dd,J=8.5, 2.4, 1H), 8.01-8.07 (m, 1H), 7.90 (d, J=8.3, 1H), 4.6 (m, 1H),4.64 (dd, J=19.1, 5.5, 1H); 4.19 (m, 1H), 3.39 (m, 1H), 3.32-3.26 (m,1H), 2.20-2.01 (m, 1H), 1.95-1.70 (m, 3H),1.40/1.35 (two app s, 9H).

LC (Cond. 1): RT=1.91 min

LC/MS: Anal. Calcd. for [M+Na]⁺ C₁₇H₂₂BrN₃NaO₄: 434.07; found 433.96.

Example 146 Step d

A mixture of ketoamide 146c (782.2 mg, 1.897 mmol) and NH₄OAc (800 mg,10.4 mmol) in xylenes was heated with a microwave (140° C.) for 90 min.The volatile component was removed in vacuo and the residue wascarefully partitioned between CH₂Cl₂ and water, where enough saturatedNaHCO₃ solution was added to neutralize it. The aqueous phase wasextracted with CH₂Cl₂ (2×), and the combined organic phase was dried(MgSO₄), filtered, and concentrated in vacuo. The resultant crudematerial was purified by flash chromatography (silica gel; 50%CH₂Cl₂/EtOAc) to afford imidazole 146d as an off-white solid (552.8 mg).¹H NMR (DMSO, δ=2.5 ppm; 400 MHz): 12.49/12.39/12.15/12.06 (br s, 1H),8.62 (app br s, 0.2H), 8.56 (d, J=2, 0.8H), 8.02 (br d, J=8.5, 0.2H),7.97 (br d, J=7.8, 0.8H), 7.77 (d, J=8.6, 0.8H), 7.72 (d, J=8.6, 0.2H),7.61-7.49 (m, 1H), 4.93-4.72 (m, 1H), 3.53 (m, 1H), 3.41-3.32 (m, 1H),2.33-1.77 (m, 4H), 1.39/1.14 (app br s, 3.7H+5.3H).

LC (Cond. 1): RT=1.67 min; >95% homogeneity index

LC/MS: Anal. Calcd. for [M+Na]⁺ C₁₇H₂₁BrN₄NaO₂: 415.08; found 415.12

NaH (60%; 11.6 mg, 0.29 mmol) was added in one batch to a heterogeneousmixture of imidazole 146d (80 mg, 0.203 mmol) and DMF (1.5 mL), andstirred at ambient condition for 30 min. SEM-Cl (40 μL, 0.226 mmol) wasadded drop-wise over 2 min to the above reaction mixture, and stirringwas continued for 14 hr. The volatile component was removed in vacuo andthe residue was partitioned between water and CH₂Cl₂. The aqueous layerwas extracted with CH₂Cl₂, and the combined organic phase was dried(MgSO₄), filtered, and concentrated in vacuo. The crude material waspurified by a flash chromatography (silica gel; 20% EtOAc/hexanes) toafford 146e as a colorless viscous oil (87.5 mg). The exactregiochemistry of 146e was not determined. ¹H NMR (CDCl₃, δ=7.4 ppm; 400MHz): 8.53 (d, J=2.2, 1H), 7.90-7.72 (m, 2H), 7.52 (s, 1H), 5.87 (m,0.46H), 5.41 (m, 0.54H), 5.16 (d, J=10.8, 1H), 5.03-4.85 (m, 1H),3.76-3.42 (m, 4H), 2.54-1.84 (m, 4H), 1.38/1.19 (br s, 4.3H+4.7H),0.97-0.81 (m, 2H), −0.03 (s, 9H).

LC (Cond. 1): RT=2.1 min

LC/MS: Anal. Calcd. for [M+H]⁺ C₂₃H₃₆BrN₄O₃Si: 523.17; found 523.24

Example 146 Step f

Pd(Ph₃P)₄ (24.4 mg, 0.021 mmol) was added to a mixture of imidazole 146e(280 mg, 0.535 mmol), 1c (241.5 mg, 0.55 mmol) and NaHCO₃ (148.6 mg,1.769 mmol) in 1,2-dimethoxyethane (4.8 mL) and water (1.6 mL). Thereaction mixture was flushed with nitrogen, heated with an oil bath at80° C. for ˜24 hr and then the volatile component was removed in vacuo.The residue was partitioned between CH₂Cl₂ and water, and the organicphase was dried (MgSO₄), filtered, and concentrated in vacuo. The crudematerial was purified by a Biotage system (silica gel; 75-100%EtOAc/hexanes) followed by a reverse phase HPLC (H₂O/MeOH/TFA). The HPLCelute was neutralized with 2M NH₃/MeOH and evaporated in vacuo, and theresidue was partitioned between water and CH₂Cl₂. The organic layer wasdried (MgSO₄), filtered, and concentrated in vacuo to afford 146f as awhite foam (162 mg).

LC (Cond. 1): RT=2.1 min

LC/MS: Anal. Calcd. for [M+H]⁺ C₄₁H₅₈N₇O₅Si: 756.43; found 756.55

Example 146 Step g

Carbamate 146f (208 mg, 0.275 mmol) was treated with 25% TFA/CH₂Cl₂ (4.0mL) and stirred at ambient temperature for 10 hr. The volatile componentwas removed in vacuo and the residue was first free-based by MCX (MeOHwash; 2.0 M NH₃/MeOH elution) and then purified by a reverse phase HPLC(H₂O/MeOH/TFA), and the resultant material was free-based again (MCX) toafford pyrrolidine 146 g as a film of oil (53.7 mg). ¹H NMR (DMSO, δ=2.5ppm; 400 MHz): 1.88 (app br s, 2H), 8.83 (d, J=2.1, 1H), 8.07 (dd,J=8.3/2.3, 1H0, 7.87 (d, J=8.5, 1H), 7.84 (d, J=8.3, 2H), 7.71 (d,J=8.3, 2H), 7.55 (s, 1H), 7.50 (br s, 1H), 4.18 (m, 2H), 3.00-2.94 (m,2H), 2.89-2.83 (m, 2H), 2.11-2.02 (m, 2H), 1.95-1.86 (m, 2H), 1.83-1.67(m, 4H).

LC (Cond. 1): RT=0.95 min; >98% homogeneity index

LC/MS: Anal. Calcd. for [M+H]⁺ C₂₅H₂₈N₇: 426.24; found 426.27

Example 146(1R)-2-((2S)-2-(5-(5-(4-(2-((2S)-1-((2R)-2-(dimethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-2-pyridinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-N,N-dimethyl-2-oxo-1-phenylethanamine

Example 146 (TFA salt) was synthesized from pyrrolidine 146 g accordingto the preparation of Example 132 from intermediate 132e.

LC (Cond. 1): RT=1.42 min; 96.5% homogenity index

LC/MS: Anal. Calcd. for [M+H]⁺ C₄₅H₅₀N₉O₂: 748.41; found 748.57

HRMS: Anal. Calcd. for [M+H]⁺ C₄₅H₅₀N₉O₂: 748.4087; found 748.4100

Example 147methyl((1R)-2-((2S)-2-(5-(5-(4-(2-((2S)-1-((2R)-2-((methoxycarbonyl)amino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-2-pyridinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate

The TFA salt of Example 147 was prepared similarly from intermediate 146g by using Cap-4.

LC (Cond. 1): RT=1.66 min; 95% homogenity index

LC/MS: Anal. Calcd. for [M+H]⁺ C₄₅H₄₆N₉O₆: 808.36; found 808.55

Example 148(1R,1′R)-2,2′-(4,4′-biphenyldiylbis(1H-imidazole-5,2-diyl(4R)-1,3-thiazolidine-4,3-diyl))bis(N,N-dimethyl-2-oxo-1-phenylethanamine)

Example 148 Step a

A solution of bromine (1.3 mL, 25.0 mmol) in 15 mL glacial acetic acidwas added drop-wise to a solution of 4-4′-diacetylbiphenyl (3.0 g, 12.5mmol) in 40 mL acetic acid at 50° C. Upon completion of addition themixture was stirred at room temperature overnight. The precipitatedproduct was filtered off and re-crystallized from chloroform to give1,1′-(biphenyl-4,4′-diyl)bis(2-bromoethanone) (3.84 g, 77.5%) as a whitesolid.

¹H NMR (500 MHz, CHLOROFORM-D) δ ppm 8.09 (4 H, d, J=7.93 Hz) 7.75 (4 H,d, J=8.24 Hz) 4.47 (4 H, s)

Nominal/LRMS—Anal. Calcd. for 369.07 found; (M+H)⁺ −397.33, (M−H)⁻395.14

Example 148 Step b

Sodium diformylamide (3.66 g, 38.5 mmol) was added to a suspension of1,1′-(biphenyl-4,4′-diyl)bis(2-bromoethanone) (6.1 g, 15.4 mmol) in 85mL acetonitrile. The mixture was heated at reflux for 4 hours andconcentrated under reduced pressure. The residue was suspended in 300 mL5% HCl in ethanol and heated at reflux for 3.5 hours. Reaction wascooled to room temperature and placed in the freezer for 1 hour.Precipitated solid was collected, washed with 200 mL 1:1 ethanol/etherfollowed by 200 mL pentane, and dried under vacuum to give1,1′-(biphenyl-4,4′-diyl)bis(2-aminoethanone)dihydrochloride (4.85 g,92%). Carried on without further purification.

¹H NMR (300 MHz, DMSO-d₆) δ ppm 8.47-8.55 (4H, m) 8.11-8.17 (4 H, m)8.00 (4 H, d, J=8.42 Hz) 4.59-4.67 (4 H, m).

LCMS-Phenomenex C-18 3.0×50 mm, 0 to 100% B over 4.0 minute gradient, 1minute hold time, A=10% methanol 90% water 0.1% TFA, B=90% methanol 10%water 0.1% TFA, t_(R)=0.44 minutes, Anal. Calcd. for C₁₆H₁₆N₂O₂ 268.31found; 269.09 (M+H)⁺.

Example 148 Step c

To a stirred solution of1,1′-(biphenyl-4,4′-diyl)bis(2-aminoethanone)dihydrochloride (0.7 g, 2.1mmol), N-(tert-butoxy carbonyl)-L-thioproline (0.96 g, 4.2 mmol), andHATU (1.68 g, 4.4 mmol) in 14 mL DMF was added diisopropylethyl amine(1.5 mL, 8.4 mmol) drop-wise over 5 minutes. The resulting clear yellowsolution was stirred at room temperature overnight (14 hours) andconcentrated under reduced pressure. The residue was partitioned between20% methanol/chloroform and water. The aqueous phase was washed oncewith 20% methanol/chloroform. The combined organics were washed withbrine, dried (MgSO₄), filtered, and concentrated under reduced pressure.The crude product was chromatographed on silica gel by gradient elutionwith 10-50% ethyl acetate/CH₂Cl₂ to give (4S,4′S)-tert-butyl4,4′-(2,2′-(biphenyl-4,4′-diyl)bis(2-oxoethane-2,1-diyl))bis(azanediyl)bis(oxomethylene)dithiazolidine-3-carboxylate(0.39 g, 27%) as an orange foam.

¹H NMR (400 MHz, DMSO-d₆) δ ppm 8.38 (2 H, s) 8.12 (4 H, d, J=8.56 Hz)7.94 (4 H, d, J=8.56 Hz) 4.60-4.68 (4 H, m) 4.33-4.38 (2 H, m) 3.58-3.68(2 H, m) 3.38 (2 H, s) 3.08-3.18 (2 H, m) 1.40 (18 H, s)

LCMS-Water-Sunfire C-18 4.6×50 mm, 0 to 100% B over 4.0 minute gradient,1 minute hold time, A=10% methanol 90% water 0.1% TFA, B=90% methanol10% water 0.1% TFA, t_(R)=3.69 min., Anal. Calcd. for C₃₄H₄₂N₄O₈S₂698.85 found; 699.12 (M+H)⁺.

Example 148 Step d

(4S,4′S)-tert-butyl4,4′-(5,5′-(biphenyl-4,4′-diyl)bis(1H-imidazole-5,2-diyl))dithiazolidine-3-carboxylate(0.39 g, 0.56 mmol) and ammonium acetate (0.43 g, 5.6 mmol) weresuspended in 8 mL o-xylene in a microwave reaction vessel. The mixturewas heated under standard microwave conditions at 140° C. for 70 minutesand concentrated under reduced pressure. The residue was dissolved in 30mL 20% methanol/chloroform and washed with 10% NaHCO₃(aq). The organiclayer was washed with brine, dried (MgSO₄), filtered, and concentratedunder reduced pressure. The crude product was chromatographed on silicagel by gradient elution with 1-6% methanol/CH₂Cl₂ to give(4S,4′S)-tert-butyl4,4′-(5,5′-(biphenyl-4,4′-diyl)bis(1H-imidazole-5,2-diyl))dithiazolidine-3-carboxylate(0.15 g, 41%) as a yellow solid.

¹H NMR (500 MHz, DMSO-d₆) δ ppm 12.02 (2 H, s) 7.70-7.88 (10 H, m)5.28-5.37 (2 H, m) 4.68 (2 H, d, J=9.16 Hz) 4.47-4.55 (2 H, m) 3.46 (2H, s) 3.23 (2 H, s) 1.26-1.43 (18 H, m)

LCMS-Luna C-18 3.0×50 mm, 0 to 100% B over 3.0 minute gradient, 1 minutehold time, A=5% acetonitrile, 95% water, 10 mm ammonium acetate, B=95%acetonitrile, 5% water, 10 mm ammonium acetate, t_(R)=1.96 min., Anal.Calcd. for C₃₄H₄₀N₆O₄S₂ 660.85 found; 661.30 (M+H)⁺, 659.34 (M−H)⁻

Example 148 Step e

To a solution of (4S,4′S)-tert-butyl4,4′-(5,5′-(biphenyl-4,4′-diyl)bis(1H-imidazole-5,2-diyl))dithiazolidine-3-carboxylatein 1 mL dioxane was added 0.3 mL of a 4.0M solution of HCl in dioxane.The reaction was stirred for 3 hours at room temperature andconcentrated under reduced pressure. The resulting tan solid was driedunder vacuum to give4,4′-bis(2-((S)-thiazolidin-4-yl)-1H-imidazol-5-yl)biphenyltetrahydrochloride (0.12 g, 100%) as a yellow solid.

¹H NMR (500 MHz, DMSO-d₆) δ ppm 8.09 (2 H, s) 8.01 (4 H, d, J=8.55 Hz)7.90 (4 H, d, J=8.55 Hz) 5.08 (2 H, t, J=6.10 Hz) 4.38 (2 H, d, J=9.16Hz) 4.23 (2 H, d, J=9.46 Hz) 3.48-3.54 (2 H, m,) 3.35-3.41 (2 H, m)

LCMS-Luna C-18 3.0×50 mm, 0 to 100% B over 4.0 minute gradient, 1 minutehold time, A=5% acetonitrile, 95% water, 10 mm ammonium acetate, B=95%acetonitrile, 5% water, 10 mm ammonium acetate, t_(R)=1.70 min., Anal.Calcd. for C₂₄H₂₄N₆S₂ 460.62 found; 461.16 (M+H)⁺, 459.31 (M−H)⁻

Example 148(1R,1′R)-2,2′-(4,4′-biphenyldiylbis(1H-imidazole-5,2-diyl(4R)-1,3-thiazolidine-4,3-diyl))bis(N,N-dimethyl-2-oxo-1-phenylethanamine)

To a stirred solution of(4,4′-bis(2-((S)-thiazolidin-4-yl)-1H-imidazol-5-yl)biphenyltetrahydrochloride (0.028 g, 0.046 mmol),(R)-2-(dimethylamino)-2-phenylacetic acid (Cap-1, 0.017 g, 0.0.10 mmol),and HATU (0.039 g, 0.10 mmol) in 2 mL DMF was added diisopropylethylamine (0.05 mL, 0.28 mmol). The reaction was stirred at room temperatureovernight (16 hours) and concentrated under reduced pressure. The crudeproduct was purified by reverse-phase preparative HPLC to provide(2R,2′R)-1,1′-((4S,4′S)-4,4′-(5,5′-(biphenyl-4,4′-diyl)bis(1H-imidazole-5,2-diyl))bis(thiazolidine-4,3-diyl))bis(2-(dimethylamino)-2-phenylethanone),TFA salt (0.012 g, 21%)

¹H NMR (500 MHz, DMSO-d₆) δ ppm 7.59-7.91 (20 H, m) 5.62 (2 H, dd,J=6.56, 2.59 Hz) 4.99 (2 H, d, J=8.85 Hz) 4.82/4.35 (2 H, s) 4.22 (2 H,s) 3.42 (2 H, s) 3.25 (2 H, s) 2.35-2.61 (12H, m)

LCMS-Luna C-18 3.0×50 mm, 0 to 100% B over 7.0 minute gradient, 1 minutehold time, A=5% acetonitrile, 95% water, 10 mm ammonium acetate, B=95%acetonitrile, 5% water, 10 mm ammonium acetate mobile phase t_(R)=3.128min.

Nominal/LRMS—Calcd. for C₄₄H₄₆N₈O₂S₂ 783.03; found 783.28 (M+H)⁺

Accurate/HRMS—Calcd. for C₄₄H₄₇N₈O₂S₂ 783.3263; 783.3246 (M+H)⁺

Example 151(1R,1′R)-2,2′-(4,4′-biphenyldiylbis((1-methyl-1H-imidazole-4,2-diyl)(2S)-2,1-pyrrolidinediyl))bis(N,N-dimethyl-2-oxo-1-phenylethanamine)

Example 151 Step a

To a stirred solution of 1d, (2S,2′S)-tert-butyl2,2′-(4,4′-(biphenyl-4,4′-diyl)bis(1H-imidazole-4,2-diyl))dipyrrolidine-1-carboxylate(100 mg, 0.16 mmole) and iodomethane (40 μL, 0.16 mmole) in CH₂Cl₂ (2mL) was added sodium hydride (40%) (21.2 mg, 0.352 mmole). After fivehours at ambient temperature, it was concentrated under reducedpressure. The crude reaction product 151a, (2S,2′S)-tert-butyl2,2′-(4,4′-(biphenyl-4,4′-diyl)bis(1-methyl-1H-imidazole-4,2-diyl))dipyrrolidine-1-carboxylate(˜90 mg) was moved onto next step without further purification (purity˜85%) LCMS: Anal. Calcd. for: C₃₈H₄₈N₆O₄ 652.83; Found: 653.51 (M+H)⁺.It should be recognized that multiple methylation isomers are possiblein this reaction and no attempt to assign these was made.

Example 151 Step b

151a, (2S,2′S)-tert-butyl2,2′-(4,4′-(biphenyl-4,4′-diyl)bis(1-methyl-1H-imidazole-4,2-diyl))dipyrrolidine-1-carboxylate(100 mg, 0.153 mmole) treated with 4 M HCl/dioxane (20 mL). After threehours at ambient temperature, it was concentrated under reducedpressure. The crude reaction product,4,4′-bis(1-methyl-2-((S)-pyrrolidin-2-yl)-1H-imidazol-4-yl)biphenyl(˜110 mg, HCl salt) was moved onto the next step without furtherpurification (purity 85%) LCMS: Anal. Calcd. for: C₂₈H₃₂N₆ 452.59;Found: 453.38 (M+H)⁺. Multiple imidazole isomers were present andcarried forward.

Example 151

HATU (58.9 mg, 0.150 mmol) was added to a mixture of 151b,4,4′-bis(1-methyl-2-((S)-pyrrolidin-2-yl)-1H-imidazol-4-yl)biphenyl(45.0 mg, 0.075 mmol), (i-Pr)₂EtN (78 μL, 0.451 mmol) and Cap-1,(R)-2-(dimethylamino)-2-phenylacetic acid (0.026 mg 0.150 mmol) in DMF(1.0 mL). The resultant mixture was stirred at ambient temperature untilthe coupling was complete as determined by LC/MS analysis. Purificationwas accomplished by reverse-phase preparative HPLC (Waters-Sunfire30×100 mm S5, detection at 220 nm, flow rate 30 mL/min, 0 to 90% B over14 min; A=90% water, 10% ACN, 0.1% TFA, B=10% water, 90% ACN, 0.1% TFA)to provide two isomer of 151,(2R,2′R)-1,1′-((2S,2′S)-2,2′-(4,4′-(biphenyl-4,4′-diyl)bis(1-methyl-1H-imidazole-4,2-diyl))bis(pyrrolidine-2,1-diyl))bis(2-(dimethylamino)-2-phenylethanone),TFA salts.

Isomer 1:(1R,1′R)-2,2′-(4,4′-biphenyldiylbis((1-methyl-1H-imidazole-4,2-diyl)(2S)-2,1-pyrrolidinediyl))bis(N,N-dimethyl-2-oxo-1-phenylethanamine)

(8 mg, 8.6%) as a colorless wax.

¹H NMR (500 MHz, DMSO-d₆) δ ppm 1.84-2.25 (m, 8 H) 2.32-2.90 (m, 12 H)3.67-3.92 (m, 8 H) 4.07 (s, 2 H) 5.23 (s, 2 H) 5.51 (s, 2 H) 7.51-7.91(m, 20 H)

HPLC Xterra 4.6×50 mm, 0 to 100% B over 10 minutes, one minutes holdtime, A=90% water, 10% methanol, 0.2% phosphoric acid, B=10% water, 90%methanol, 0.2% phosphoric acid, RT=2.74 min, 98%.

LCMS: Anal. Calcd. for: C₄₈H₅₄N₈O₂ 775.02; Found: 775.50 (M+H)⁺.

Isomer 2:(1R,1′R)-2,2′-(4,4′-biphenyldiylbis((1-methyl-1H-imidazole-4,2-diyl)(2S)-2,1-pyrrolidinediyl))bis(N,N-dimethyl-2-oxo-1-phenylethanamine)

(10.2 mg, 11%) as a colorless wax.

¹H NMR (500 MHz, DMSO-d₆) δ ppm 1.83-2.26 (m, 8 H) 2.30-2.92 (m, 12 H)3.68-3.94 (m, 8 H) 4.06 (s, 2 H) 5.25 (d, J=2.14 Hz, 2 H) 5.50 (s, 2 H)7.52-7.91 (m, 20 H).

HPLC Xterra 4.6×50 mm, 0 to 100% B over 10 minutes, one minutes holdtime, A=90% water, 10% methanol, 0.2% phosphoric acid, B=10% water, 90%methanol, 0.2% phosphoric acid, RT=2.75 min, 90%.

LCMS: Anal. Calcd. for: C₄₈H₅₄N₈O₂ 775.02; Found: 775.52 (M+H)⁺.

Example 152

Example 152a-1 Step a 2-Chloro-5-(1-ethoxyvinyl)pyrimidine

To a solution of 5-bromo-2-chloropyrimidine (12.5 g, 64.62 mmol) in dryDMF (175 mL) under N₂ was added tributyl(1-ethoxyvinyl)tin (21.8 mL,64.62 mmol) and dichlorobis(triphenylphosphine)palladium (II) (2.27 g,3.23 mmol). The mixture was heated at 100° C. for 3 h before beingallowed to stir at room temperature for 16 hr. The mixture was thendiluted with ether (200 mL) and treated with aqueous KF soln (55 g ofpotassium fluoride in 33 mL of water). The two phase mixture was stirredvigorously for 1 h at room temperature before being filtered throughdiatomaceous earth (Celite®). The filtrate was washed with sat'd NaHCO₃soln and brine prior to drying (Na₂SO₄). The original aqueous phase wasextracted with ether (2×) and the organic phase was treated as above.Repetition on 13.5 g of 5-bromo-2-chloropyrimidine and combinedpurification by Biotage™ flash chromatography on silica gel (gradientelution on a 65M column using 3% ethyl acetate in hexanes to 25% ethylacetate in hexanes with 3.0 L) afforded the title compound as a white,crystalline solid (18.2 g, 73%).

¹H NMR (500 MHz, DMSO-d₆) δ 8.97 (s, 2H), 5.08 (d, J=3.7 Hz, 1H), 4.56(d, J=3.4 Hz, 1H), 3.94 (q, J=7.0 Hz, 2H), 1.35 (t, J=7.0 Hz, 3H).

LCMS Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 3 minutes, 1minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water, 90%methanol, 0.1% TFA, RT=2.53 min, 98.8% homogeneity index.

LCMS: Anal. Calcd. for C₈H₁₀ClN₂O 185.05; found: 185.04 (M+H)⁺.

HRMS: Anal. Calcd. for C₈H₁₀ClN₂) 185.0482; found: 185.0490 (M+H)⁺.

The same method was used for the preparation of Examples 152a-2 &152a-3:

LC conditions: Condition 1: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% Bover 3 minutes, 1 minute hold time, A=90% water, 10% methanol, 0.1% TFA,B=10% water, 90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

Condition 2: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 2 minutes,1 minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water,90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

Ex-ample152a-2

t_(R) = 2.24 min 96.4%,condition 1LRMS: Anal. Calcd. forC₈H₁₀ClN₂O185.05; found:185.06 (M + H)⁺.HRMS: Anal. Calcd. forC₈H₁₀ClN₂O185.0482;found: 185.0476 (M + H)⁺. Ex-ample152a-3

t_(R) = 2.82 min (52.7%,inseparable with 2,5-dibrompyrazine (t_(R) =1.99 min,43.2%)); condition 1LRMS: Anal. Calcd. forC₈H₁₀BrN₂O 229.00;found:228.93 (M + H)⁺.

Example 152b-1 Step b (S)-tert-Butyl2-(5-(2-chloropyrimidin-5-yl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylateor(S)-2-[5-(2-Chloro-pyrimidin-5-yl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylicacid tert-butyl ester

NBS (16.1 g, 90.7 mmol) was added in one portion to a stirred solutionof 2-chloro-5-(1-ethoxyvinyl)pyrimidine (152a-1, 18.2 g, 98.6 mmol) inTHF (267 mL) and H₂O (88 mL) at 0° C. under N₂. The mixture was stirredfor 1 h at 0° C. before it was diluted with more H₂O and extracted withethyl acetate (2×). The combined extracts were washed with sat'd NaHCO₃soln and brine prior to drying (Na₂SO₄), filtration, and solventevaporation. LCMS Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 3minutes, 1 minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10%water, 90% methanol, 0.1% TFA, RT=1.52 min (unsymmetrical peak).

LCMS: Anal. Calcd. for C₆H₁₄BrClN₂O 235.92; found: 236.85 (M+H)⁺.

Example 152c-1 Step c

Half of the crude residue (2-bromo-1-(2-chloropyrimidin-5-yl)ethanone,˜14.5 g) was dissolved into anhydrous acetonitrile (150 mL) and treateddirectly with N-Boc-L-proline (9.76 g, 45.35 mmol) anddiisopropylethylamine (7.9 mL, 45.35 mmol). After being stirred for 3 h,the solvent was removed in vacuo and the residue was partitioned intoethyl acetate and water. The organic phase was washed with 0.1Nhydrochloric acid, sat'd NaHCO₃ soln and brine prior to drying (Na₂SO₄),filtration, and concentration. LCMS Phenomenex LUNA C-18 4.6×50 mm, 0 to100% B over 3 minutes, 1 minute hold time, A=90% water, 10% methanol,0.1% TFA, B=10% water, 90% methanol, 0.1% TFA, RT=2.66 min.

The same method was used to prepare Examples 152c-2 through 152c-6.

LC conditions: Condition 1: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% Bover 3 minutes, 1 minute hold time, A=90% water, 10% methanol, 0.1% TFA,B=10% water, 90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

Condition 2: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 2 minutes,1 minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water,90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

Example152c-2

t_(R) = 1.81 min (condition2, ~95%)LRMS: Anal. Calcd. forC₁₅H₁₉BrN₄O₂386.05found: 387.07 (M + H)⁺. Example152c-3

t_(R) = 1.84 min (condition2, 94%)LRMS: Anal. Calcd. forC₁₅H₁₉BrN₂O₅386.05;found: 387.07 (M + H)⁺. Example152c-3a

t_(R) = 2.65 min; condition 1LCMS: Anal. Calcd. forC₁₆H₂₀ClN₃O₅369.11found: 391.89 (M + Na)⁺. Example152c-4

t_(R) = 1.94 min, (condition2)LCMS: Anal. Calcd. forC₁₆H₂₁BrN₃O₅414.07found: 414.11 (M + H)⁺. Example152c-5

t_(R) = 2.22 min; condition1LCMS: Anal. Calcd. forC₁₄H₁₈ClN₃O₅343.09found: undetermined. Example152c-6

t_(R) = 2.41 min, condition 1LCMS: Anal. Calcd. forC₁₄H₁₈ ³⁷BrN₃O₅389.04found: 412.03 (M + Na)⁺.

Example 152d-1 Step d

This residue ((S)-1-tert-butyl2-(2-(2-chloropyrimidin-5-yl)-2-oxoethyl)pyrrolidine-1,2-dicarboxylate)was taken up in xylenes (200 mL) and treated to NH₄OAc (17.5 g, 0.23mol). The mixture was heated at 140° C. for 2 hr in a thick-walled,screw-top flask before it was cooled to ambient temperature andsuction-filtered. The filtrate was then concentrated, partitioned intoethyl acetate and sat'd NaHCO₃ soln and washed with brine prior todrying (Na₂SO₄), filtration, and concentration The original precipitatewas partitioned into aqueous NaHCO₃ soln and ethyl acetate and sonicatedfor 2 min before being suction-filtered. The filtrate was washed withbrine, dried over (Na₂SO₄), filtered, and concentrated to dryness.Purification of the combined residues by Biotage™ flash chromatographyon silica gel (65M column, preequilibration with 2% B for 900 mLfollowed by gradient elution with 2% B to 2% B for 450 ml followed by 2%B to 40% B for 300 mL where B=methanol and A=dichloromethane) affordedthe title compound (7.0 g, 44% yield, 2 steps, pure fraction) as anyellowish orange foam. The mixed fractions were subjected to a secondBiotageTM chromatography on silica gel (40M column, preequilibrationwith 1% B for 600 mL followed by gradient elution with 1% B to 1% B for150 ml followed by 1% B to 10% B for 1500 mL where B=MeOH and A=CH₂Cl₂)afforded additional title compound (2.8 g, 18%) as a brownish-orangefoam. ¹H NMR (500 MHz, DMSO-d₆) δ 12.24-12.16 (m, 1H), 9.05 (s, 2H),7.84-7.73 (m, 1H), 4.90-4.73 (m, 1H), 3.59-3.46 (m, 1H), 3.41-3.31 (m,1H), 2.32-2.12 (m, 1H), 2.03-1.77 (m, 3H), 1.39 and 1.15 (2s, 9H).

LCMS Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 3 minutes, 1minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water, 90%methanol, 0.1% TFA, RT=1.92 min, 94.7% homogeneity index.

LRMS: Anal. Calcd. for C₁₆H₂₁ClN₅O₂ 350.14; found: 350.23 (M+H)⁺.

HRMS: Anal. Calcd. for C₁₆H₂₁ClN₅O₂ 350.1384; found: 350.1398 (M+H)⁺.

The same method was used to prepare Examples 152d-2 through 152d-6.

LC conditions: Condition 1: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% Bover 3 minutes, 1 minute hold time, A=90% water, 10% methanol, 0.1% TFA,B=10% water, 90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

Condition 2: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 2 minutes,1 minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water,90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

Example152d-2

t_(R) = 1.92 min (86.5%);condition 1LRMS: Anal. Calcd. forC₁₆H₂₁ClN₅O₂350.14; found:350.23 (M + H)⁺.HRMS: Anal. Calcd. forC₁₆H₂₁ClN₅O₂350.1384;found: 350.1393 (M + H)⁺. Example152d-3

t_(R) = 1.90 min (>95%); condition1LRMS: Anal. Calcd. forC₁₆H₂₁BrN₅O₂394.09; found:393.82 (M + H)⁺.HRMS: Anal. Calcd. forC₁₆H₂₁BrN₅O₂394.0879;found: 394.0884 (M + H)⁺. Example152d-4

t_(R) = 1.45 min (condition 2,100%)LRMS: Anal. Calcd. forC₁₅H₁₉BrN₄O₂366.07 found:367.07 (M + H)⁺. Example152d-5

t_(R) = 1.88 min (>95%); condition1LRMS: Anal. Calcd. forC₁₄H₁₈BrN₅O₂367.06; found:368.10 (M + H)⁺. Example152d-6

t_(R) = 1.66 min (85%); condition1LRMS: Anal. Calcd. forC₁₄H₁₈ClN₅O₂323.11; found:324.15 (M + H)⁺.

Example 152e-1 Step e Example 152e-1: (S)-tert-Butyl2-(5-(2-chloropyrimidin-5-yl)-1-((2-(trimethyl-silyl)ethoxy)methyl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylate

Sodium hydride (60% dispersion in mineral oil, 0.23 g, 5.72 mmol) wasadded in one portion to a stirred solution of (S)-tert-butyl2-(5-(2-chloropyrimidin-5-yl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylate(152d-1, 2.0 g, 5.72 mmol) in dry DMF (45 mL) at ambient temperatureunder N₂. The mixture was stirred for 5 min. before SEM chloride (1.01mL, 5.72 mmol) was added in approx. 0.1 mL increments. The mixture wasstirred for 3 h before being quenched with sat'd NH₄Cl soln and dilutedwith ethyl acetate. The organic phase was washed with sat'd NaHCO₃ solnand brine, dried over (Na₂SO₄), filtered, and concentrated. The originalaqueous phase was extracted twice more and the combined residue waspurified by Biotage™ flash chromatography (40M column, 50 mL/min,preequilibration with 5% B for 750 mL, followed by step gradient elutionwith 5% B to 5% B for 150 mL, 5% B to 75% B for 1500 mL, then 75% B to100% B for 750 mL where solvent B is ethyl acetate and solvent A ishexanes). Concentration of the eluant furmished the title compound as apale yellow foam (2.35 g, 85%).

¹H NMR (500 MHz, DMSO-d₆) δ 9.04 (s, 2H), 7.98-7.95 (m, 1H), 5.70-5.31(3m, 2H), 5.02-4.91 (m, 1H), 3.59-3.49 (m, 3H), 3.45-3.35 (m, 1H),2.30-2.08 (m, 2H), 1.99-1.83 (m, 2H), 1.36 and 1.12 (2s, 9H), 0.93-0.82(m, 2H), −0.02 (s, 9H).

LCMS Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 2 minutes, 2minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water, 90%methanol, 0.1% TFA, RT=2.38 min, 95% homogeneity index.

LRMS: Anal. Calcd. for C₂₂H₃₅ClN₅O₃Si 480.22; found: 480.23 (M+H)⁺.

HRMS: Anal. Calcd. for C₂₂H₃₅ClN₅O₃Si 480.2198; found: 480.2194 (M+H)⁺.

The same method was used to prepare 152e-2 through 152e-4

LC conditions: Condition 1: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% Bover 3 minutes, 1 minute hold time, A=90% water, 10% methanol, 0.1% TFA,B=10% water, 90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

Condition 2: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 2 minutes,1 minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water,90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

Example 152e-2

t_(R) = 2.34 min (85.7%);condition 1LCMS: Anal. Calcd. forC₂₂H₃₅ClN₅O₃Si480.22;found: 480.22 (M + H)⁺.HRMS: Anal. Calcd. forC₂₂H₃₅ClN₅O₃Si480.2198found: 480.2198 (M + H)⁺. Example 152e-3

t_(R) = 3.18 min (>95%);condition 1LCMS: Anal. Calcd. forC₂₂H₃₅³⁷BrN₅O₃Si 526.17;found: 525.99 (M + H)⁺.HRMS: Anal. Calcd. forC₂₂H₃₅³⁷BrN₅O₃Si526.1692; found: 526.1674(M + H)⁺. Example 152e-4

t_(R) = 2.14 min (condition 2,96%)LRMS: Anal. Calcd. forC₂₁H₃₃BrN₄O₃Si496.15found: 497.13 (M + H)⁺.

Examples 152f-1 to 152f-2 Example 152f-1(S)-1-(2-(5-(2-chloropyrimidin-5-yl)-1H-imidazol-2-yl)pyrrolidin-1-yl)-2-(pyridin-3-yl)ethanone

Cold (0° C.) 4 N HCl in dioxanes (5 mL) was added via syringe to(S)-tert-butyl2-(5-(2-chloropyrimidin-5-yl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylate(152d-1, 0.50 g, 1.43 mmol) in a 100 mL pear-shaped flask followed byMeOH (1.0 mL). The suspension was stirred at room temperature for 4 hbefore it was concentrated down to dryness and placed under high vacuumfor 1 h. There was isolated intermediate(S)-2-chloro-5-(2-(pyrrolidin-2-yl)-1H-imidazol-5-yl)pyrimidinetrihydrochloride as a pale yellow solid (with an orange tint) which wasused without further purification.

HATU (0.60 g, 1.57 mmol) was added in one portion to a stirred solutionof intermediate(S)-2-chloro-5-(2-(pyrrolidin-2-yl)-1H-imidazol-5-yl)pyrimidinetrihydrochloride (0.46 g, 1.43 mmol, theoretical amount),2-(pyridin-3-yl)acetic acid (0.25 g, 1.43 mmol) and DIEA (1.0 mL, 5.72mmol) in anhydrous DMF (10 mL) at ambient temperature. The mixture wasstirred at room temperature for 2 h before the DMF was removed in vacuo.The residue was taken up in CH₂Cl₂ and subjected to Biotage™ flashchromatography on silica gel (40M column, preequilibration with 0% B for600 mL followed by step gradient elution with 0% B to 0% B for 150 mLfollowed by 0% B to 15% B for 1500 mL followed by 15% B to 25% B for 999mL where B=MeOH and A=CH₂Cl₂). There was isolated the title compound(0.131 g, 25%, 2 steps) as a yellow solid.

¹H NMR (500 MHz, DMSO-d₆) δ9.10-9.08 (2s, 2H), 8.72-8.55 (series of m,2H), 8.21-8.20 and 8.11-8.10 (2m, 1H), 8.00 and 7.93 (2s, 1H), 7.84-7.77(series of m, 1H), 5.43-5.41 and 5.17-5.15 (2m, 1H), 4.02-3.94 (3m, 2H),3.90-3.58 (3m, 2H), 2.37-2.26 (m, 1H), 2.16-1.85 (2m, 3H).

LCRMS Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 3 minutes, 1minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water, 90%methanol, 0.1% TFA, RT=0.92 min, 95.1% homogeneity index.

LRMS: Anal. Calcd. for C₁₈H₁₈ClN₆O 369.12; found: 369.11 (M+H)⁺.

HRMS: Anal. Calcd. for C₁₈H₁₈ClN₆O 369.1231; found: 369.1246 (M+H)⁺.

Examples 152 g-1 to 152 g-17 Example 152 g-1 from 1c and 152e-1.(S)-2-[5-(2-{4-[2-((S)-1-tert-Butoxycarbonyl-pyrrolidin-2-yl)-3H-imidazol-4-yl]-phenyl}-pyrimidin-5-yl)-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylicacid tert-butyl ester

Pd (Ph₃)₄ (0.12 g, 0.103 mmol) was added in one portion to a stirredsuspension of (S)-tert-butyl2-(5-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylate(1c, 1.00 g, 2.27 mmol), (S)-tert-butyl2-(5-(2-chloropyrimidin-5-yl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylate(152c-1, 0.99 g, 2.06 mmol) and NaHCO₃ (0.87 g, 10.3 mmol) in a solutionof DME (20 mL) and H₂O (6 mL) at room temperature under N₂. The vesselwas sealed and the mixture was placed into a preheated (80° C.) oil bathand stirred at 80° C. for 16 h before additional catalyst (0.12 g) wasadded. After heating the mixture for an additional 12 h at 80° C., themixture was cooled to ambient temperature, diluted with ethyl acetateand washed with sat'd NaHCO₃ soln and brine prior to drying overanhydrous sodium sulfate and solvent concentration. Purification of theresidue by Biotage™ flash chromatography on silica gel using a 40Mcolumn (preequilibrated with 40% B followed by step gradient elutionwith 40% B to 40% B for 150 mL, 40% B to 100% B for 1500 mL, 100% B to100% B for 1000 mL where B=ethyl acetate and A=hexanes) furnished thetitle compound as a yellow foam (1.533 g, 98%). A small amount of theyellow foam was further purified for characterization purposes by pHPLC(Phenomenex GEMINI, 30×100 mm, S10, 10 to 100% B over 13 minutes, 3minute hold time, 40 mL/min, A=95% water, 5% acetonitrile, 10 mM NH₄OAc,B=10% water, 90% acetonitrile, 10 mM NH₄OAc) to yield 95% pure titlecompound as a white solid.

¹H NMR (500 MHz, DMSO-d₆) δ 12.30-11.88 (3m, 1H), 9.17-9.16 (m, 2H),8.43-8.31 (m, 2H), 7.99-7.35 (series of m, 4H), 5.72-5.30 (3m, 2H),5.03-4.76 (2m, 2H), 3.64-3.50 (m, 4H), 3.48-3.31 (m, 2H), 2.36-2.07 (m,2H), 2.05-1.80 (m, 4H), 1.46-1.08 (2m, 18H), 0.95-0.84 (m, 2H), −0.01(s, 9H).

HPLC Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 3 minutes, 1minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water, 90%methanol, 0.1% TFA, RT=2.91 min, 95% homogeneity index.

LRMS: Anal. Calcd. for C₄₀H₅₇N₈O₅Si 757.42; found: 757.42 (M+H)⁺.

HRMS: Anal. Calcd. for C₄₀H₅₇N₈O₅Si 757.4221; found: 757.4191 (M+H)⁺.

The same procedure was used to prepare Examples 152 g-2 through 152g-17:

LC conditions: Condition 1: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% Bover 3 minutes, 1 minute hold time, A=90% water, 10% methanol, 0.1% TFA,B=10% water, 90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

Condition 2: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 2 minutes,1 minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water,90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

Example152g-2

t_(R) = 2.81 min (79%); Condition 1LRMS: Anal. Calcd. forC₄₀H₅₇N₈O₅Si757.42; found:758.05 (M + H)⁻.HRMS: Anal. Calcd. forC₄₀H₅₇N₈O₅Si747.4221; found:757.4196 (M + H)⁺. Example152g-3

t_(R) = 2.89 min (>95%); Condition 1LRMS: Anal. Calcd. forC₄₀H₅₇N₈O₅Si757.42; found:757.35 (M + H)⁻.HRMS: Anal. Calcd. forC₄₀H₅₇N₈O₅Si757.4221; found:757.4191 (M + H)⁺. Example152g-4

t_(R) = 2.87 min (97%); Condition 1LRMS: Anal. Calcd. forC₃₈H₅₅N₈O₅S_(i)731.41; found:731.26 (M + H)⁻.HRMS: Anal. Calcd. forC₃₈H₅₅N₈O₅S_(i)731.4065; found:731.4070 (M + H)⁺. Example152g-5

t_(R) = 2.94 min (>95%); Condition 1LRMS: Anal. Calcd. forC₃₈H₅₅N₈O₅Si731.41; found:731.26 (M + H)⁻.HRMS: Anal. Calcd. forC₃₈H₅₅N₈O₅Si731.4065; found:731.4046 (M + H)⁺. Example152g-6

t_(R) = 1.99 min (condition 2, 96%)LRMS: Anal. Calcd. forC₃₇H₅₃N₇O₂Si703.39; found:704.34 (M + H)⁻. Example152g-7

t_(R) = 1.99 min (condition 2, 96%)LRMS: Anal. Calcd. forC₃₉H₅₅N₇O₅Si729.40 found:730.42(M + H)⁺. Example152g-8

t_(R) = 2.15 min (>95%); Condition 1LRMS: Anal. Calcd. forC₃₇H₄₁N₈O₄661.33; found: 661.39(M + H)⁺.HRMS: Anal. Calcd. forC₃₇H₄₁N₈O₄ 661.3251;found:661.3268 (M + H)⁺. Example152g-9

t_(R) = 1.71 min (>95%); Condition 1LRMS: Anal. Calcd. forC₃₆H₄₀N₉O₃646.76; found: 646.47(M + H)⁺.HRMS: Anal. Calcd. forC₃₆H₄₀N₉O₃ not donefound: notdone (M + H)⁺. Example152g-10

t_(R) = 1.71 min (>95%); Condition 1LRMS: Anal. Calcd. forC₃₆H₄₀N₉O₃646.33; found: 646.37(M + H)⁺.HRMS: Anal. Calcd. forC₃₆H₄₀N₉O₃ 646.3254;found:646.3240 (M + H)⁺. Example152g-11

t_(R) = 2.12 min (>93.9%); Condition1LRMS: Anal. Calcd. forC₃₃H₄₂N₇O₄600.33; found: 600.11(M + H)⁺.HRMS: Anal. Calcd. forC₃₃H₄₂N₇O₄ 600.3298;found:600.3312 (M + H)⁺. Example152g-12

t_(R) = 2.13 min (97.3%); Condition 1LRMS: Anal. Calcd. forC₃₂H₄₁N₈O₄601.33; found: 601.36(M + H)⁺.HRMS: Anal. Calcd. forC₃₂H₄₁N₈O₄ 601.3251;found:601.3253 (M + H)⁺. Example152g-13

t_(R) = 2.11 min (98.5%); Condition 1LRMS: Anal. Calcd. forC₃₂H₄₁N₈O₄601.33; found: 601.36(M + H)⁺.HRMS: Anal. Calcd. forC₃₂H₄₁N₈O₄ 601.3251;found:601.3253 (M + H)⁺. Example152g-14

t_(R) = 2.18 min (>95%); Condition 1LRMS: Anal. Calcd. forC₃₃H₄₃N₈O₄615.34; found: 615.38(M + H)⁺.HRMS: Anal. Calcd. forC₃₃H₄₃N₈O₄ 615.3407;found:615.3433 (M + H)⁺. Example152g-15

t_(R) = 2.20 min (97.7%); Condition 1LRMS: Anal. Calcd. forC₃₅H₃₉N₈O₄635.31; found: 635.36(M + H)⁺.HRMS: Anal. Calcd. forC₃₅H₃₉N₈O₄ 635.3094;found:635.3119 (M + H)⁺. Example152g-16

t_(R) = 2.26 min (>95%); Condition 1LRMS: Anal. Calcd C₃₆H₄₁N₈O₄649.33;found: 649.39 (M + H)⁺.HRMS: Anal. Calcd. forC₃₆H₄₁N₈O₄ 649.3251;found:649.3276 (M + H)⁺. Example152g-17

t_(R) = 2.98 min (98.5%); Condition 1LRMS: Anal. Calcd. forC₃₈H₅₄N₈O₅Si730.39; found:731.40 (M + H)⁻.HRMS: Anal. Calcd. forC₃₈H₅₄N₈O₅Si731.4065; found:731.4045 (M + H)⁺.

Example 152h-1-152h-7 Example 152h-1 from 152 g-1.5-((S)-2-Pyrrolidin-2-yl-3H-imidazol-4-yl)-2-[4-((S)-2-pyrrolidin-2-yl-3H-imidazol-4-yl)-phenyl]-pyrimidine

TFA (8 mL) was added in one portion to a stirred solution of(S)-2-[5-(2-{4-[2-((S)-1-tert-butoxycarbonyl-pyrrolidin-2-yl)-3H-imidazol-4-yl]-phenyl}-pyrimidin-5-yl)-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylicacid tert-butyl ester (1.50 g, 1.98 mmol) in dry CH₂Cl₂ (30 mL) at roomtemperature. The flask was sealed and the mixture was stirred at roomtemperature for 16 h before the solvent(s) were removed in vacuo. Theresidue was taken up in methanol, filtered through a PVDF syringe filter(13 mm×0.45 μm), distributed to 8 pHPLC vials and chromatographed byHPLC (gradient elution from 10% B to 100% B over 13 min on a PhenomenexC18 column, 30×100 mm, 10 μm, where A=90% water, 10% methanol, 0.1% TFA,B=10% water, 90% methanol, 0.1% TFA). After concentration of theselected test tubes by speed vacuum evaporation, the product wasdissolved in methanol and neutralized by passing the solution through anUCT CHQAX 110M75 anion exchange cartridge. There was isolated the titlecompound as a yellow mustard-colored solid (306.7 mg, 36% yield) uponconcentration of the eluant.

¹H NMR (500 MHz, DMSO-d₆) μ 12.50-11.80 (br m, 2H), 9.18 (s, 2H), 8.36(d, J=8.5 Hz, 2H), 7.89 (d, J=8.2 Hz, 2H), 7.77 (s, 1H), 7.61 (s, 1H),4.34-4.24 (m, 2H), 3.09-2.89 (m, 4H), 2.18-2.07 (m, 2H), 2.02-1.89 (m,2H), 1.88-1.72 (m, 4H).

LCMS Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 3 minutes, 1minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water, 90%methanol, 0.1% TFA, RT=1.33 min, >95% homogeneity index.

LRMS: Anal. Calcd. for C₂₄H₂₇N₈ 427.24; found: 427.01 (M+H)⁺.

HRMS: Anal. Calcd. for C₂₄H₂₇N₈ 427.2359; found: 427.2363 (M+H)⁺.

The same conditions were used to prepare Examples 152h-2 through152h-14.

LC conditions: Condition 1: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% Bover 3 minutes, 1 minute hold time, A=90% water, 10% methanol, 0.1% TFA,B=10% water, 90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

Condition 2: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 2 minutes,1 minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water,90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

Example 152h-2

t_(R) = 1.36 min (98%);Condition 1LRMS: Anal. Calcd.for C₂₄H₂₇N₈427.24;found: 427.48 (M + H)⁺.HRMS: Anal. Calcd.for C₂₄H₂₇N₈427.2359;found: 427.2339(M + H)⁺. Example 152h-3

t_(R) = 1.17 min (>95%);Condition 1LRMS: Anal. Calcd.for C₂₂H₂₅N₈401.22;found: 401.16 (M + H)⁺.HRMS: Anal. Calcd.for C₂₂H₂₅N₈401.2202;found: 401.2193(M + H)⁺. Example 152h-4

t_(R) = 1.28 min (89.3%);Condition 1LRMS: Anal. Calcd.for C₂₂H₂₅N₈401.22;found: 401.16 (M + H)⁺.HRMS: Anal. Calcd.for C₂₂H₂₅N₈401.2202;found: 401.2201(M + H)⁺. Example 152h-5

t_(R) = 0.93 min;Condition 2LRMS: Anal. Calcd.for C₂₃H₂₅N₇ 399;found:400 (M + H)⁺. Example 152h-6

t_(R) = 0.81 min;Condition 2LRMS: Anal. Calcd.for C₂₁H₂₃N₇ 373;found:374 (M + H)⁺. Example 152h-7

t_(R) = 1.14 min (>95%);Condition 1LRMS: Anal. Calcd.for C₂₃H₂₆N₇400.23;found: 400.14 (M + H)⁺.HRMS: Anal. Calcd.for C₂₃H₂₆N₇400.2250;found: 400.2234(M + H)⁺. Example 152h-8

t_(R) = 1.29 min (>95%);Condition 1LRMS: Anal. Calcd.for C₂₂H₂₅N₈401.22;found: 401.21 (M + H)⁺.HRMS: Anal. Calcd.for C₂₂H₂₅N₈401.2202;found: 401.2204(M + H)⁺. Example 152h-9

t_(R) = 1.29 min (97.6%);Condition 1LRMS: Anal. Calcd.for C₂₂H₂₅N₈401.22;found: 401.21 (M + H)⁺.HRMS: Anal. Calcd.for C₂₂H₂₅N₈401.2202;found: 401.2220(M + H)⁺. Example 152h-10

t_(R) = 1.26 min (86.4%);Condition 1LRMS: Anal. Calcd.for C₂₄H₂₇N₈427.24;found: 427.48 (M + H)⁺.HRMS: Anal. Calcd.for C₂₄H₂₇N₈427.2359;found: 427.2339(M + H)⁺. Example 152h-11

t_(R) = 1.26 min (>95%);Condition 1LRMS: Anal. Calcd.for C₃₁H₃₂N₉O546.27;found: 546.28 (M + H)⁺.HRMS: Anal. Calcd.for C₃₁H₃₂N₉O546.2730found:546.2739 (M + H)⁺. Example 152h-12

t_(R) = 1.39 min (95%);Condition 1LRMS: Anal. Calcd.for C₃₁H₃₂N₉O546.27;found: 546.32 (M + H)⁺.HRMS: Anal. Calcd.for C₃₁H₃₂N₉O546.2730;found:546.2719 (M + H)⁺. Example 152h-13

t_(R) = 1.42 min;Condition 1LRMS: Anal. Calcd.for C₂₃H₂₆N₈ 414.24;found:415.27 (M + H)⁺.HRMS: Anal. Calcd.for C₂₃H₂₆N₈ 415.2359;found:415.2371(M + H)⁺. Example 152h-14

t_(R) = 1.30 min;Condition 1LRMS: Anal. Calcd.for C₂₂H₂₄N₈ 400.21;found:401.24 (M + H)⁺.HRMS: Anal. Calcd.for C₂₂H₂₄N₈ 401.2202;found:401.2198(M + H)⁺.

Example 152i-1 to 152i-3 Example 152i-1 from 152g-8(S)-2-(5-{2-[4-((S)-2-Pyrrolidin-2-yl-3H-imidazol-4-yl)-phenyl]-pyrimidin-5-yl}-1H-imidazol-2-yl)-pyrrolidine-1-carboxylicacid tert-butyl ester

A solution of(S)-2-[5-(2-{4-[2-((S)-1-Benzyloxycarbonyl-pyrrolidin-2-yl)-3H-imidazol-4-yl]-phenyl}-pyrimidin-5-yl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylicacid tert-butyl ester (317.1 mg, 0.48 mmol) in MeOH (1 mL) was added toa stirred suspension of 10% palladium on carbon (60 mg) and K₂CO₃ (70mg) in a solution of MeOH (5 mL) and H₂O (0.1 mL) at room temperatureunder N₂. The flask was charged and evacuated three times with H₂ andstirred for 3 h at atmosphere pressure. Additional catalyst (20 mg) wasthen added and the reaction mixture was stirred further for 3 h beforeit was suction-filtered through diatomaceous earth (Celite®) andconcentrated. The residue was diluted with MeOH, filtered through a PVDFsyringe filter (13 mm×0.45 μm), distributed into 4 pHPLC vials andchromatographed (gradient elution from 20% B to 100% B over 10 min on aPhenomenex-Gemini C18 column (30×100 mm, 10 μm) where A=95% water, 5%acetonitrile, 10 mM NH₄OAc, B=10% water, 90% acetonitrile, 10 mMNH₄OAc). After concentration of the selected test tubes by speed vacuumevaporation, there was isolated the title compound as a yellow solid(142.5 mg, 56% yield).

¹H NMR (400 MHz, DMSO-d₆) δ 12.35-12.09 (br m, 1H), 9.17 (s, 2H), 8.35(d, J=8.3 Hz, 2H), 7.87 (d, J=8.3 Hz, 2H), 7.80-7.72 (m, 1H), 7.56 (s,1H), 4.92-4.77 (m, 1H), 4.21-4.13 (m, 1H), 3.61-3.05 (2m, 4H), 3.02-2.80(2m, 2H), 2.37-1.67 (series of m, 6H), 1.41 and 1.17 (2s, 9H).

LCMS Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 3 minutes, 1minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water, 90%methanol, 0.1% TFA, RT=1.77 min, >95% homogeneity index.

LRMS: Anal. Calcd. for C₂₉H₃₅N₈O₂ 527.29; found: 527.34 (M+H)⁺.

HRMS: Anal. Calcd. for C₂₉H₃₅N₈O₂ 527.2883; found: 527.2874 (M+H)⁺.

The same procedure was used to prepare Examples 152i-2 through 152i-3.LC conditions: Condition 1: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% Bover 3 minutes, 1 minute hold time, A=90% water, 10% methanol, 0.1% TFA,B=10% water, 90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.Condition 2: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 2 minutes,1 minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water,90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

Example 152i-2

t_(R) = 1.70 min (95.7%);Condition 1LRMS: Anal. Calcd. forC₂₇H₃₃N₈O₂501.27; found:501.35 (M + H)⁺.HRMS: Anal. Calcd. forC₂₇H₃₃N₈O₂501.2726found: 501.2709 (M + H)⁺. Example 152i-3

t_(R) = 1.77 min (>95%);Condition 1LRMS: Anal. Calcd. forC₂₈H₃₅N₈O₂515.29; found:515.37 (M + H)⁺.HRMS: Anal. Calcd. forC₂₈H₃₅N₈O₂515.2883found: 515.2869 (M + H)⁺.

Examples 152j-1 to 152j-28

Examples 152j were isolated as TFA or AcOH salts prepared using theprocedure to convert Example 148e to 148.

LC conditions: Condition 1: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% Bover 3 minutes, 1 minute hold time, A=90% water, 10% methanol, 0.1% TFA,B=10% water, 90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.Condition 2: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 2 minutes,1 minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water,90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

Ex- am- ple Compound Name Structure Data Ex-ample152j-1(1R)-2-((2S)-2-(5-(2-(4-(2-((2S)-1-((2R)-2-(dimethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-5-pyrimidinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-N,N-dimethyl-2-oxo-1-phenylethanamine

t_(R) = 1.61 min;(>95%);Condition1LRMS: Anal.Calcd. forC₄₄H₄₉N₁₀O₂749.40found:749.3 (M + H)⁺HRMS: Anal.Calcd.forC₄₄H₄₉N₁₀O₂749.4040found:749.4042(M + H)⁺ Ex-ample152j-2 methyl((1R)-2-((2S)-2-(5-(2-(4-(2-((2S)-1-((2R)-2-((methoxycarbonyl)a-mino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-5-pyrimidinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carba-mate

t_(R) = 1.99min(>95%);Condition1LRMS: Anal.Calcd. forC₄₄H₄₅N₁₀O₆809.35found:809.17(M + H)⁺HRMS: Anal.Calcd.forC₄₄H₄₅N₁₀O₆809.3524found:809.3505(M + H)⁺ Ex-ample152j-3 methyl((1R)-2-oxo-1-phenyl-2-((2S)-2-(5-(4-(5-(2-((2S)-1-(3-pyridinylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyrimidinyl)phenyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)ethyl)car-bamate

t_(R) = 1.65 min(92.3%);Condition1LRMS: Anal.Calcd. forC₄₁H₄₁N₁₀O₂737.33found:737.49(M + H)⁺HRMS: Anal.Calcd.forC₄₁H₄₁N₁₀O₄737.3312found:737.3342(M + H)⁺ Ex-ample152j-4 methyl((1R)-2-oxo-1-phenyl-2-((2S)-2-(5-(2-(4-(2-((2S)-1-(3-pyridinylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-5-pyrimidinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)ethyl)car-bamate

t_(R) = 1.64 min(>95%);Condition1LRMS: Anal.Calcd. forC₄₁H₄₁N₁₀O₄737.33found:737.75(M + H)⁺HRMS: Anal.Calcd.forC₄₁H₄₁N₁₀O₄737.3312found:737.3284(M + H)⁺ Ex-ample152j-55-(2-((2S)-1-((2R)-2-phenyl-2-(1-piperidinyl)acetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-(4-(2-((2S)-1-((2R)-2-phenyl-2-(1-piperidinyl)acetyl)-2-pyrrolidinyl)-1H-imidazol-4-yl)phenyl)pyrimidine

t_(R) = 1.70 min(>95%); Condi-tion1LRMS: Anal.Calcd.forC₅₀H₅₇N₁₀O₂829.47 found:829.39(M + H)⁺HRMS: Anal.Calcd.forC₅₀H₅₇N₁₀O₂829.4666found:829.4658(M + H)⁺ Ex-ample152j-6(2R)-N-methyl-2-phenyl-N-((1S)-1-(4-(4-(5-(2-((2S)-1-((2R)-2-phenyl-2-(1-piperidinyl)acetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyrimidinyl)phenyl)-1H-imidazol-2-yl)ethyl)-2-(1-piperidinyl)acetamide

t_(R) = 1.66 min(>95%);Condition1LRMS: Anal.Calcd. forC₄₉H₅₇N₁₀O₂817.47found:817.44(M + H)⁺HRMS: Anal.Calcd.forC₄₉H₅₇N₁₀O₂817.4666found:817.4673(M + H)⁺ Ex-ample152j-7(1R)-2-((2S)-2-(5-(5-(4-(2-((2S)-1-((2R)-2-(dimethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-2-pyrazinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-N,N-dimethyl-2-oxo-1-phenylethanamine

t_(R) = 1.60 min(>95%); Condi-tion1LRMS: Anal.Calcd.forC₄₁H₄₉N₁₀O₂749.40 found:749.31(M + H)⁺HRMS: Anal.Calcd.forC₄₄H₄₉N₁₀O₂749.4040found:749.4031(M + H)⁺ Ex-ample152j-8 methyl((1R)-2-((2S)-2-(5-(5-(4-(2-((2S)-1-((2R)-2-((methoxycarbonyl)a-mino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-2-pyrazinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate

t_(R) = 2.01 min(>95%);Condition1LRMS: Anal.Calcd. forC₄₄H₄₅N₁₀O₆809.35found:809.24(M + H)⁺HRMS: Anal.Calcd.forC₄₄H₄₅N₁₀O₆809.3523found:809.3493(M + H)⁺ Ex-ample152j-9(1R)-2-((2S)-2-(5-(6-(4-(2-((2S)-1-((2R)-2-(dimethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-3-pyridazinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-N,N-dimethyl-2-oxo-1-phenylethanamine

t_(R) = 1.76 min(>95%); Condi-tion1LRMS: Anal.Calcd.forC₄₄H₄₉N₁₀O₂749.40 found:notobsd (M + H)⁺HRMS: Anal.Cacld.forC₄₄H₄₉N₁₀O₂749.4040found:749.4056(M + H)⁺ Ex-ample152j-10 methyl((1R)-2-((2S)-2-(5-(6-(4-(2-((2S)-1-((2R)-2-((methoxycarbonyl)a-mino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-3-pyridazinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carba-mate

t_(R) = 2.17 min(>95%);Condition1LRMS: Anal.Calcd. forC₄₄H₄₅N₁₀O₆809.35found:809.59(M + H)⁺HRMS: Anal.Calcd.forC₄₄H₄₅N₁₀O₆809.3524found:809.3499(M + H)⁺ Ex-ample152j-11(2R)-2-(dimethylamino)-N-((1S)-1-(5-(4-(5-(2-((2S)-1-((2R)-2-(dimethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyridinyl)phenyl)-1H-imidazol-2-yl)ethyl)-2-phenylacetamide

t_(R) = 1.56 min(>95%); Condi-tion1LRMS: Anal.Calcd. forC₄₁H₄₈N₉O₂722.39found: 722.89(M + H)⁺HRMS: Anal.Calcd.forC₄₃H₄₈N₉O₂722.3931found:722.3930(M + H)⁺ Ex-ample152j-12 methyl((1R)-2-((2S)-2-(5-(6-(4-(2-((1S)-1-(((2R)-2-((methoxycarbonyl)a-mino)-2-phenyl-acetyl)amino)eth-yl)-1H-imidazol-5-yl)phenyl)-3-pyridinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate

t_(R) = 1.95 min(>95%);Condition1LRMS: Anal.Calcd. forC₄₃ ₄₄N₉O₆782.34found: 782.93(M + H)⁺HRMS: Anal.Calcd.forC₄₃H₄₄N₉O₆782.3415found:782.3398(M + H)⁺ Ex-ample152j-13(2R)-2-(dimethylamino)-N-((1S)-1-(5-(4-(6-(2-((2S)-1-((2R)-2-(dimethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-3-pyridazinyl)phenyl)-1H-imidazol-2-yl)ethyl)-2-phenylacetamide

t_(R) = 1.55 min(>95%);Condition1LRMS: Anal.Calcd. forC₄₂H₄₇N₁₀O₂723.39found:723.88(M + H)⁺HRMS: Anal.Calcd.forC₄₂H₄₇N₁₀O₂723.3883found:723.3903(M + H)⁺ Ex-ample152j-14 methyl((1R)-2-((2S)-2-(5-(6-(4-(2-((1S)-1-(((2R)-2-((methoxycarbonyl)a-mino)-2-phenyl-acetyl)amino)eth-yl)-1H-imidazol-5-yl)phenyl)-3-pyridazinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate

t_(R) = 1.95 min(>95%);Condition1LRMS: Anal.Calcd. forC₄₂H₄₃N₁₀O₆783.34found:783.95(M + H)⁺HRMS: Anal.Calcd.forC₄₂H₄₃N₁₀O₆783.3367found:783.3337(M + H)⁺ Ex-ample152j-15 methyl((1R)-2-((2S)-2-(5-(2-(4-(2-((1S)-1-(((2R)-2-((methoxycarbonyl)a-mino)-2-phenyl-acetyl)amino)eth-yl)-1H-imidazol-5-yl)phenyl)-5-pyrimidinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate

t_(R) = 1.97 min(>95%);Condition1LRMS: Anal.Calcd. forC₄₂H₄₃N₁₀O₆783.34found:783.97(M + H)⁺HRMS: Anal.Calcd.forC₄₂H₄₃N₁₀O₆783.3367found:783.3357(M + H)⁺ Ex-ample152j-16(2R)-2-(dimethylamino)-N-((1S)-1-(5-(2-(4-(2-((2S)-1-((2R)-2-(dimethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-5-pyrimidinyl)-1H-imidazol-2-yl)ethyl)-2-phenylacetamide

t_(R) = 1.61 min(>95%);Condition1LRMS: Anal.Calcd. forC₄₂H₄₇N₁₀O₂723.39found:723.52(M + H)⁺HRMS: Anal.Calcd.forC₄₂H₄₇N₁₀O₂723.3883found:723.3893(M + H)⁺ Ex-ample152j-17 methyl((1R)-2-((2S)-2-(5-(4-(5-(2-((1S)-1-(((2R)-2-((methoxycarbonyl)a-mino)-2-phenyl-acetyl)amino)eth-yl)-1H-imidazol-5-yl)-2-pyrimidinyl)phenyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carba-mate

t_(R) = 1.99 min(95.6%);Condition1LRMS: Anal.Calcd.forC₄₂H₄₃N₁₀O₆783.34found:783.44(M + H)⁺HRMS: Anal.Calcd.forC₄₂H₄₃N₁₀O₆783.3367found:783.3328(M + H)⁺ Ex-ample152j-18(2R)-2-(dimethylamino)-N-((1S)-1-(5-(5-(4-(2-((2S)-1-((2R)-2-(dimethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-2-pyrazinyl)-1H-imidazol-2-yl)ethyl)-2-phenylacetamide

t_(R) = 1.60 min(>95%); Condi-tion1LRMS: Anal.Calcd.forC₄₂H₄₇N₁₀O₂723.39 found:723.47(M + H)⁺HRMS: Anal.Calcd.forC₄₂H₄₇H₁₀O₂723.3883found:723.3861(M + H)⁺ Ex-ample152j-19 methyl((1R)-2-((2S)-2-(5-(4-(5-(2-((1S)-1-(((2R)-2-((methoxycarbonyl)a-mino)-2-phenyl-acetyl)amino)eth-yl)-1H-imidazol-5-yl)-2-pyrazinyl)phenyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate

t_(R) = 1.97 min(94.7%);Condition1LRMS: Anal.Calcd. forC₄₂H₄₃N₁₀O₆783.34found:783.69(M + H)⁺HRMS: Anal.Calcd.forC₄₂H₄₃N₁₀O₆783.3367found:783.3345(M + H)⁺ Ex-ample152j-20(2R)-2-(dimethylamino)-N-((1S)-1-(5-(4-(5-(2-((2S)-1-((2R)-2-(dimethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyrimidinyl)phenyl)-1H-imidazol-2-yl)ethyl)-N-methyl-2-phenylacetamide

t_(R) = 1.54 min(>95%); Condi-tion1LRMS: Anal.Calcd.forC₄₃H₄₉N₁₀O₂737.40 found:737.54(M + H)⁺HRMS: Anal.Calcd.forC₄₃H₄₉N₁₀O₂737.4040found:7374066(M + H)⁺ Ex-ample152j-21 methyl((1R)-2-((2S)-2-(5-(2-(4-(2-((1S)-1-(((2R)-2-((methoxycarbonyl)a-mino)-2-phenylacetyl)(methyl)amino)ethyl)-1H-imidazol-5-yl)phenyl)-5-pyrimidinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate

t_(R) = 2.00 min(>95%);Condition1LRMS: Anal.Calcd. forC₄₃H₄₅N₁₀O₆797.35found:797.38(M + H)⁺HRMS: Anal.Calcd.forC₄₃H₄₅N₁₀O₆797.3524found:797.3528(M + H)⁺ Ex-ample152j-22 methyl((1R)-2-((2S)-2-(5-(4-(5-(2-((1S)-1-(((2R)-2-((methoxycarbonyl)a-mino)-2-phenyl-acetyl)amino)eth-yl)-1H-imidazol-5-yl)-2-pyridinyl)phenyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate

t_(R) = 1.46 min(condition2, 98%)LRMS: Anal.Calcd. forC₄₃H₄₃N₉O₆781.33;found:782.34(M + H)⁺.HRMS: Anal.Calcd.forC₄₃H₄₄N₉O₆782.3415found:782.3417(M + H)⁺ Ex-ample152j-23 methyl((1R)-2-(((1S)-1-(5-(6-(4-(2-(((1S)-1-(((2R)-2-((methoxycarbonyl)a-mino)-2-phenyl-acetyl)amino)eth-yl)-1H-imidazol-5-yl)phenyl)-3-pyridinyl)-1H-imidazol-2-yl)ethyl)amino)-2-oxo-1-phenylethyl)carbamate

t_(R) =1.44 mincondition2, 90%)LRMS: Anal.Calcd. forC₄₁H₄₁N₉O₆755.32;found:756.35(M + H)⁺.HRMS: Anal.Calcd.forC₄₁H₄₂N₉O₆756.3258found:756.3239(M + H)⁺. Ex-ample152j-24(2R)-2-(dimethylamino)-N-((1S)-1-(5-(6-(4-(2-((1S)-1-(((2R)-2-(dimethylamino)-2-phenyl-acetyl)amino)eth-yl)-1H-imidazol-5-yl)phenyl)-3-pyridinyl)-1H-imidazol-2-yl)ethyl)-2-phenylacetamide

t_(R) = 1.18 min(condition2, 91%)LRMS: Anal.Calcd. forC₄₁H₄₅N₉O₂695.37;found:696.37(M + H)⁺.HRMS: Anal.Calcd.forC₄₁H₄₆N₉O₂696.3774found:696.3806(M + H)⁺. Ex-ample152j-25

t_(R) = 2.08min (95.8%);Condition 1LRMS: Anal.Calcd.forC₃₈H₄₄N₉O₅706.35; found:706.53(M + H)⁺.HRMS: Anal.Calcd.forC₃₈H₄₄N₉O₅706.3465;found:706.3492(M + H)⁺. Ex-ample152j-26

t_(R) = 2.04min (96.4%);Condition 1LRMS: Anal.Calcd.forC₃₇H₄₂N₉O₅692.33; found:692.49(M + H)⁺.HRMS: Anal.Calcd.forC₃₇H₄₂N₉O₅692.3309;found:692.3322(M + H)⁺. Ex-ample152j-27

t_(R) = 2.04min (>95%);Condition 1LRMS: Anal.Calcd. forC₃₉H₄₄N₉O₅718.35;found:718.49(M + H)⁺.HRMS: Anal.Calcd.forC₃₉H₄₄N₉O₅718.3465;found:718.3483(M + H)⁺. Ex-ample152j-28 methyl((1R)-2-((2S)-2-(5-(5-(4-(2-((1S)-1-((2R)-2-((methoxycarbonyl)a-mino)-2-phenyl-acetyl)amino)eth-yl)-1H-imidazol-5-yl)phenyl)-2-pyrazinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate

t_(R) =2.00 min(>95%);Condition1LRMS: Anal.Calcd. forC₄₂H₄₃N₁₀O₆783.34found:783.96(M + H)⁺HRMS: Anal.Calcd.forC₄₂H₄₃N₁₀O₆783.3367found:783.3375(M + H)⁺

Examples 152k-1 to 152k- Example 152k-1 from 152j-27{(R)-2-Oxo-1-phenyl-2-[(S)-2-(5-{4-[5-((S)-2-pyrrolidin-2-yl-3H-imidazol-4-yl)-pyrimidin-2-yl]-phenyl}-1H-imidazol-2-yl)-pyrrolidin-1-yl]-ethyl}-carbamicacid methyl ester

Cold (0° C.) 4 N HCl in dioxanes (4 mL) was added via syringe to(S)-2-{5-[2-(4-{2-[(S)-1-((R)-2-methoxycarbonylamino-2-phenyl-acetyl)-pyrrolidin-2-yl]-3H-imidazol-4-yl}-phenyl)-pyrimidin-5-yl]-1H-imidazol-2-yl}-pyrrolidine-1-carboxylicacid tert-butyl ester (104.6 mg, 0.146 mmol) in a 100 mL pear-shapedflask followed by MeOH (0.5 mL). The homogeneous mixture was stirred atroom temperature for 15 min before a precipitate was observed. Afterstirring further for 1.75 h, the suspension was diluted with ether andhexanes. Suction-filtration of a small portion of the suspension yieldedthe title compound as a yellow solid which was used for characterizationpurposes. The balance of the suspension was concentrated down to drynessand placed under high vacuum for 16 h. There was isolated the rest ofthe title compound also as a yellow solid (137.7 mg, 123%) which wasused without further purification.

¹H NMR (500 MHz, DMSO-d₆) δ 15.20 and 14.66 (2m, 1H), 10.29 (br s,0.7H), 9.38-9.36 (m, 2H), 8.55-8.00 (series of m, 4H), 7.42-7.28 (2m,3H), 5.53-4.00 (series of m, 7H), 3.99-3.13 (series of m, 4H), 3.57 and3.52 (2s, 3H), 2.50-1.84 (series of m, 8H).

LCMS Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 3 minutes, 1minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water, 90%methanol, 0.1% TFA, RT=1.79 min, >95% homogeneity index.

LRMS: Anal. Calcd. for C₃₄H₃₆N₉O₃ 618.29; found: 618.42 (M+H)⁺.

HRMS: Anal. Calcd. for C₃₄H₃₆N₉O₃ 618.2921; found: 618.2958 (M+H)⁺.

The same procedure was used to prepare Examples 152k-2 through 152k-3.

LC conditions: Condition 1: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% Bover 3 minutes, 1 minute hold time, A=90% water, 10% methanol, 0.1% TFA,B=10% water, 90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.Condition 2: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 2 minutes,1 minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water,90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

Example Compound Name Structure Data Example152k-2

t_(R) = 1.74 min(>95%);Condition 1LRMS: Anal.Calcd. forC₃₂H₃₄N₉O₃592.28;found:592.41 (M + H)⁺.HRMS: Anal.Calcd. forC₃₂H₃₄N₉O₃592.2785;found:592.2775(M + H)⁺. Example152k-3

t_(R) = 1.79 min(>95%);Condition 1LRMS: Anal.Calcd. forC₃₃H₃₆N₉O₃606.29;found:606.43 (M + H)⁺.HRMS: Anal.Calcd. forC₃₃H₃₆N₉O₃606.2941;found:606.2925(M + H)⁺.

Examples 152l-1 to 152l-3

Examples 152l-1 through 152l-3 were isolated as TFA or AcOH saltsprepared using the same procedure to convert Example 148e to 148.

LC conditions: Condition 1: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% Bover 3 minutes, 1 minute hold time, A=90% water, 10% methanol, 0.1% TFA,B=10% water, 90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.Condition 2: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 2 minutes,1 minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water,90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

Ex- am- ple Compound Name Structure Data Ex-am-ple152l-1 methyl((1R)-2-(meth-yl((1S)-1-(4-(4-(5-(2-((2S)-1-((2R)-2-phenyl-2-(1-piperi-dinyl)acetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyrimi-dinyl)phenyl)-1H-imidazol-2-yl)eth-yl)amino)-2-oxo-1-phenyl-ethyl)carbamate

t_(R) = 1.87 min(>95%);Condition1LRMS: Anal.Calcd. forC₄₆H₅₁N₁₀O₄807.41found:807.57 (M + H)⁺HRMS: Anal.Calcd.forC₄₆H₅₁N₁₀O₄807.4095found:807.4128(M + H)⁺ Ex-am-ple152l-2methyl((1R)-2-oxo-1-phen-yl-2-(((1S)-1-(4-(4-(5-(2-((2S)-1-((2R)-2-phenyl-2-(1-piperi-dinyl)acetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyrimi-dinyl)phenyl)-1H-imidazol-2-yl)eth-yl)amino)ethyl)car-bamate

t_(R) = 1.83 min(>95%);Condition1LRMS: Anal.Calcd. forC₄₅H₄₉N₁₀O₄793.39found:793.52 (M + H)⁺HRMS: Anal.Calcd. forC₄₅H₄₉N₁₀O₄793.3938found:793.3934(M + H)⁺ Ex-am-ple152l-3 methyl((1R)-2-oxo-1-phe-nyl-2-((2S)-2-(4-(4-(5-(2-((2S)-1-((2R)-2-phenyl-2-(1-piperidinyl)acetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyrimi-dinyl)phenyl)-1H-imidazol-2-yl)-1-pyrroli-dinyl)ethyl)carba-mate

t_(R) = 1.87 min(>95%);Condition1LRMS: Anal.Calcd. forC₄₇H₅₁N₁₀O₄819.41found:819.50(M + H)⁺HRMS: Anal.Calcd. forC₄₇H₅₁N₁₀O₄819.4095found:819.4127(M + H)⁺

Examples 153a-1 through 153a-4. Example 153a-1 prepared from 152e-1(S)-2-[5-{5′-[2-((S)-1-tert-Butoxycarbonyl-pyrrolidin-2-yl)-3-(2-trimethylsilanyl-ethoxymethyl)-3H-imidazol-4-yl]-[2,2′]bipyrimidinyl-5-yl}-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylicacid tert-butyl ester

To a stirred solution of (S)-tert-butyl2-(5-(2-chloropyrimidin-5-yl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylate(1.0 g, 2.08 mmol) and dichlorobis(benzonitrile)palladium (40 mg, 0.104mmol) in dry DMF (10 mL) at room temperature under argon was added neattetrakis(dimethylamino)ethylene (1.0 mL, 4.16 mmol). The mixture washeated to 60° C. for 15 h before it was diluted with ethyl acetate andsuction-filtered through diatomaceous earth (Celite®). The filtrate waswashed with sat'd NaHCO₃ soln and brine prior to drying over Na₂SO₄ andsolvent evaporation. Purification of the residue by Biotage™ flashchromatography on silica gel (step gradient elution with 15% B to 15% Bfor 150 mL, 15% B to 75% B for 1500 mL, 75% B to 100% B for 1000 mL,100% B to 100% B for 1000 mL where B=ethyl acetate and A=hexane followedby a second gradient elution with 10% B to 100% B for 700 mL whereB=methanol and A=ethyl acetate) furnished the title compound as acaramel-colored, viscous oil (487.8 mg, 26% yield).

¹H NMR (500 MHz, DMSO-d₆) δ 9.27 (s, 4H), 8.09-8.06 (m, 2H), 5.73-5.66and 5.50-5.44 (2m, 2H), 5.06-4.93 (m, 2H), 3.60-3.39 (2m, 8H), 2.32-2.08(3m, 4H), 2.00-1.85 (m, 4H), 1.37 and 1.14 (2s, 18H), 0.95-0.84 (m, 4H),−0.01 (s, 18H).

LCMS Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 3 minutes, 1minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water, 90%methanol, 0.1% TFA, RT=3.37 min, >95% homogeneity index.

LRMS: Anal. Calcd. for C₄₄H₆₉N₁₀O₆Si₂ 889.49; found: 889.57 (M+H)⁺.

HRMS: Anal. Calcd. for C₄₄H₆₉N₁₀O₆Si₂ 889.4940; found: 889.4920 (M+H)⁺.

The same procedure was used to prepare Examples 153a-2 through 153a-4.

LC conditions: Condition 1: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% Bover 3 minutes, 1 minute hold time, A=90% water, 10% methanol, 0.1% TFA,B=10% water, 90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.Condition 2: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 2 minutes,1 minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water,90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

Compound Example Name Structure Data Example153a-2

t_(R) = 3.37 min(89.6%); Condition1LRMS: Anal.Calcd.forC₄₄H₆₉N₁₀O₆Si₂889.49; found:889.56 (M + H)⁺.HRMS: Anal.Calcd.forC₄₄H₆₉N₁₀O₆Si₂889.494; found:889.4951 (M + H)⁺. Example153a-3

t_(R) = 3.37 min(95%); Condition 1LRMS: Anal.Calcd.forC₄₄H₆₉N₁₀O₆S_(i2)889.49; found:889.51 (M + H)⁺.HRMS: Anal.Calcd.forC₄₄H₆₉N₁₀O₆S_(i2)889.4940; found:889.4915 (M + H)⁺. Example153a-4

t_(R) = 2.3 min(condition 2)LRMS: Anal.Calcd. forC₄₂H₆₆N₈Si₂ 834;found:835(M + H)⁻.

Example 153b-1-153b-3

The hydrolysis reactions was performed as above for Example 152h.

LC conditions: Condition 1: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% Bover 3 minutes, 1 minute hold time, A=90% water, 10% methanol, 0.1% TFA,B=10% water, 90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.Condition 2: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 2 minutes,1 minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water,90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

Example Compound Name Structure Data Example153b-1

t_(R) = 1.18 min(>95%); Condition 1LRMS: Anal.Calcd. forC₂₂H₂₅N₁₀429.23;found: 429.01(M + H)⁺.HRMS: Anal.Calcd. forC₂₂H₂₅N₁₀429.2264;found:429.2259 (M + H)⁺. Example153b-2

t_(R) = 1.26 min(>95%); Condition 1LRMS: Anal.Calcd. forC₄₁H₄₁N₁₀O₂737.33found: 737.49(M + H)⁺HRMS: Anal.Calcd. forC₄₁H₄₁N₁₀O₄737.3312found:737.3342 (M + H)⁺ Example153b-3

t_(R) = 1.40 min(>95%); Condition 1LRMS: Anal.Calcd. forC₂₂H₂₅N₁₀429.23;found: 429.20(M + H)⁺.HRMS: Anal.Calcd. forC₂₂H₂₅N₁₀:429.2264;Found:429.2254 (M + H)⁺ Example153b-4

t_(R) = 0.85 min(condition 1)LCMS: Anal.Calcd. for C₂₀H₂₂N₈374; found:375(M + H)⁺.

Examples 153c-1 to 153c-7

Examples 153c-1 through 153c-7 were isolated as TFA or AcOH salts usingthe procedure used to convert Example 148e to 148.

LC conditions: Condition 1: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% Bover 3 minutes, 1 minute hold time, A=90% water, 10% methanol, 0.1% TFA,B=10% water, 90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.Condition 2: Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 2 minutes,1 minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water,90% methanol, 0.1% TFA, 220 nm, 5 μL injection volume.

Ex- am- Compound ple Name Structure Data Ex-am-ple153c-1(1R,1′R)-2,2′-(3,3′-bipyri-dazine-6,6′-diylbis(1H-imi-dazole-5,2-diyl(2S)-2,1-pyrrolidine-diyl)bis(N,N-dimeth-yl-2-oxo-1-phenyl-ethanamine)

t_(R) =1.55 min(>95%);Condition 1LRMS: Anal.Calcd.for C₄₂H₄₇N₁₂O₂751.39found:751.64(M + H)⁺HRMS: Anal.Calcd.for C₄₂H₄₇N₁₂O₂751.3945found:751.3936(M + H)⁺ Ex-am-ple153c-2 dimethyl(3,3′-bipyrida-zine-6,6′-diylbis(1H-imi-dazole-5,2-diyl(2S)-2,1-pyrrolidine-diyl((1R)-2-oxo-1-phenyl-2,1-ethane-diyl)))biscarba-mate

t_(R) = 1.95 min(>95%);Condition 1LRMS: Anal.Calcd.for C₄₂H₄₃N₁₂O₆811.34found:811.22(M + H)⁺HRMS: Anal.Calcd.for C₄₂H₄₃N₁₂O₆811.3429found:811.3406(M + H)⁺ Ex-am-ple153c-3(1R,1′R)-2,2′-(2,2′-bipyrimi-dine-5,5′-diylbis(1H-imidazole-5,2-diyl(2S)-2,1-pyrrolidine-diyl))bis(N,N-dimeth-yl-2-oxo-1-phenyl-ethanamine)

t_(R) = 1.51 min(>90%*);Condition 1LRMS: Anal.Calcd.forC₄₂H₄₇N₁₂O₂751.39 found:751.21(M + H)⁺HRMS: Anal.Calcd.forC₄₂H₄₇N₁₂O₂751.3945 found:751.3921(M + H)⁺ Ex-am-ple153c-4 dimethyl(2,2′-bipyrimi-dine-5,5′-diylbis(1H-imi-dazole-5,2-diyl(2S)-2,1-pyrrolidine-diyl((1R)-2-oxo-1-phe-nyl-2,1-ethane-diyl)))biscarba-mate

t_(R) =1.88 min(>95%);Condition 1LRMS: Anal.Calcd.for C₄₂H₄₃N₁₂O₆811.34found:811.10(M + H)⁺HRMS: Anal.Calcd.for C₄₂H₄₃N₁₂O₆811.3429found:811.3401(M + H)⁺ Ex-am-ple153c-5(1R,1′R)-2,2′-(2,2′-bipyrazine-5,5′-diylbis(1H-imidazole-5,2-diyl(2S)-2,1-pyrrolidine-diyl))bis(N,N-dimeth-yl-2-oxo-1-phenyl-ethanamine)

t_(R) =1.61 min (>95%);Condition 1LRMS: Anal.Calcd.for C₄₂H₄₇N₁₂O₂751.39found:751.30(M + H)⁺HRMS: Anal.Calcd.for C₄₂H₄₇N₁₂O₂751.3945found:751.3943(M + H)⁺ Ex-am-ple153c-6 dimethyl(2,2′-bipyrazine-5,5′-diylbis(1H-imi-dazole-5,2-diyl(2S)-2,1-pyrrolidine-diyl((1R)-2-oxo-1-phe-nyl-2,1-ethane-diyl)))biscarba-mate

t_(R) =2.00 min (>95%);Condition 1LRMS: Anal.Calcd.for C₄₂H₄₃N₁₂O₆811.34found:811.23(M + H)⁺HRMS: Anal.Calcd.for C₄₂H₄₃N₁₂O₆811.3429found:811.3407(M + H)⁺ Ex-am-ple153c-7 dimethyl(2,2′-bipyridine-5,5′-diylbis(1H-imidazole-5,2-diyl(1S)-1,1-ethanediyl-imino((1R)-2-oxo-1-phenyl-2,1-ethane-diyl)))biscarba-mate

t_(R) = 1.42 min(condition 2,94%)LRMS: Anal.Calcd.for C₄₀H₄₀N₁₀O₆756.31;found:757.34(M + H)⁺.HRMS: Anal.Calcd.for C₄₀H₄₁N₁₀O₆757.3211found:757.3180(M + H)⁺.

Section F LC Conditions for determining retention time

Condition 7

Column: Phenomenex C18 10u 4.6×30 mm

Start % B=0

Final % B=100

Gradient Time=3 min

Flow Rate=4 mL/Min

Wavelength=220

Solvent A=10% methanol—90% H₂O—0.1% TFA

Solvent B=90% methanol—10% H₂O—0.1% TFA

Compound F70 was prepared following the procedure described in AnnaHelms et al., J. Am. Chem. Soc. 1992 114(15) pp 6227-6238.

Compound F71 was prepared in analogous fashion to the procedure used tosythesize Example 1.

¹H NMR (500 MHz, DMSO-d₆) δ ppm 0.69-0.95 (m, 12H) 1.92 (s, 12H)1.97-2.27 (m, 8H) 2.40 (s, 2H) 3.55 (s, 6H) 3.73-3.97 (m, 4H) 4.12 (t,J=7.78 Hz, 2H) 5.14 (t, J=7.02 Hz, 2H) 7.34 (d, J=8.24 Hz, 2H) 7.49-7.70(m, 4H) 8.04 (s, 2H) 14.59 (s, 2H) RT=2.523 minutes (condition 7, 96%);LRMS: Anal. Calcd. for C44H58N8O6 794.45; found: 795.48 (M+H)⁺.

Section cj: Synthesis of Carbamate Replacements Example cj-2 and cj-3

Preparation of (S)-tert-Butyl2-(5-(4′-(2-((S)-1-((S)-2-amino-3-methylbutanoyl)pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylate(cj-2)

To a solution of (S)-tert-butyl2-(5-(4′-(2-((S)-pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylate(cj-1) (1.00 g, 1.91 mmol), iPr₂NEt (1.60 mL, 9.19 mmol) and N-Z-valine(0.62 g, 2.47 mmol) in DMF (10 mL) was added HATU (0.92 g, 2.42 mmol).The solution was allowed to stir at rt for 1 h and then it was pouredinto ice water (ca. 250 mL) and allowed to stand for 20 min. The mixturewas filtered and the solid washed with water and then dried in vacuoovernight to afford a colorless solid (1.78 g) which was used as such inthe next step. LCMS: Anal. Calcd. for C₄₄H₅₁N₇O₅: 757; found: 758(M+H)⁺. A mixture of this material (1.70 g) and 10% Pd-C (0.37 g) inMeOH (100 mL) was hydrogenated (balloon pressure) for 12 h. The mixturewas then filtered and the solvent removed in vacuo. The residue waspurified by silica gel chromatography (Biotage system/0-10% MeOH—CH₂Cl₂)to afford the title compound as a light yellow foam (0.90 g, 76%).

¹HNMR (400 MHz, DMSO-d₆) δ 12.18 (s, 0.35H), 11.73 (s, 0.65H), 11.89 (s,0.65H), 11.82 (s, 0.35H), 7.77-7.81 (m, 3H), 7.57-7.71 (m, 5H),7.50-7.52 (m, 2H), 5.17 (dd, J=3.6, 6.5 Hz, 0.3H), 5.08 (dd, J=3.6, 6.5Hz, 0.7H), 4.84 (m, 0.3H), 4.76 (m, 0.7H), 3.67-3.69 (m, 1H), 3.50-3.62(m, 1H), 3.34-3.47 (m, 2H), 2.22-2.28 (m, 2H), 2.10-2.17 (m, 2H),1.74-2.05 (m, 6H), 1.40 (s, 4H), 1.15 (s, 5H), 0.85-0.91 (m, 4H), 0.79(d, J=6.5 Hz, 2H).

LCMS: Anal. Calcd. for C₃₆H₄₅N₇O₃: 623; found: 624 (M+H)⁺.

Preparation of (S)-tert-Butyl2-(5-(4′-(2-((S)-1-((R)-2-amino-3-methylbutanoyl)pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylate(cj -3)

(S)-tert-Butyl2-(5-(4′-(2-((S)-1-((R)-2-amino-3-methylbutanoyl)pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylate(cj-3) was prepared using the same method used to prepare cj-2 to give acolorless foam (1.15 g, 76%). ¹HNMR (400 MHz, DMSO-d₆) δ 12.17 (s,0.35H), 12.04 (s, 0.65H), 11.89 (s, 0.65H), 11.81 (s, 0.35H), 7.78-7.83(m, 3H), 7.60-7.71 (m, 5H), 7.43-7.52 (m, 2H), 5.22-5.25 (m, 0.4H),5.05-5.07 (m, 0.6H), 4.83-4.86 (m, 0.5H), 4.72-4.78 (m, 0.5H), 3.78-3.84(m, 1H), 3.49-3.64 (m, 2H), 3.35-3.43 (m, 2H), 2.19-2.32 (m, 1H),2.04-2.17 (m, 3H), 1.95-2.04 (m, 2H), 1.76-1.90 (m, 3H), 1.40 (s, 4H),1.15 (s, 5H), 0.85-0.91 (m, 4H), 0.67 (d, J=6.5 Hz, 1H), 0.35 (d, J=6.5Hz, 1H). LCMS: Anal. Calcd. for C₃₆H₄₅N₇O₃: 623; found: 624 (M+H)⁺.

Example cj-4 and cj-5

Preparation of (S)-tert-Butyl2-(5-(4′-(2-((S)-1-((S)-3-methyl-2-(pyrimidin-2-ylamino)butanoyl)pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylate(cj-4)

A mixture of (S)-tert-butyl2-(5-(4′-(2-((S)-1-((s)-2-amino-3-methylbutanoyl)pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylate(cj-2) (0.45 g, 0.72 mmol), 2-bromopyrimidine (0.37 g, 2.34 mmol) andiPr₂NEt (0.20 mL, 1.18 mmol) in toluene-DMSO (4:1, 5 mL) was heated at90° C. overnight. The volatiles were removed in vacuo and the residuewas purified by preparative HPLC (YMC Pack C-18, 30×100mm/MeCN—H₂O-TFA). The title compound (0.56 g, 74%), as its TFA salt, wasobtained as a yellow-orange glass.

¹HNMR (400 MHz, DMSO-d₆) δ 14.56 (br s, 2H), 8.28 (d, J=5.0 Hz, 1H),8.12-8.20 (m, 2H), 7.94-7.97 (m, 3H), 7.83-7.91 (m, 5H), 7.06 (d, J=8.1Hz, 1H), 6.62 (app t, J=5.0 Hz, 1H), 4.99-5.10 (m, 2H), 4.50 (app t,J=7.7 Hz, 1H), 4.07-4.12 (m, 2H), 3.83-3.87 (m, 1H), 3.56-3.62 (m, 1H),3.40-3.47 (m, 2H), 2.36-2.41 (m, 1H), 1.94-2.22 (m, 6H), 1.40 (s, 4H),1.17 (s, 5H), 0.88 (app t, J=6.5 Hz, 6H).

LCMS: Anal. Calcd. for C₄₀H₄₇N₉O₃: 701; found: 702 (M+H)⁺.

Preparation of(S)-tert-Butyl-2-(5-(4′-(2-((S)-1-((R)-3-methyl-2-(pyrimidin-2-ylamino)butanoyl)pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylate(cj-5)

The TFA salt of the title compound was prepared following the samemethod method used to prepare cj-4 to give a light yellow solid (0.375g, 59%).

¹HNMR (400 MHz, DMSO-d₆) δ 14.67 (br s, 2H), 8.30 (d, J=4.3 Hz, 1H),8.04-8.19 (m, 2H), 7.84-7.96 (m, 8H), 6.88 (d, J=8.6 Hz, 1H), 6.61 (appt, J=4.5 Hz, 1H), 5.17 (dd, J=4.4, 8.0 Hz, 1H), 5.00-5.07 (m, 1H), 4.67(dd, J=7.3, 8.1 Hz, 1H), 3.91-3.96 (m, 1H), 3.70-3.75 (m, 1H), 3.56-3.62(m, 1H), 3.42-3.45 (m, 1H), 2.39-2.43 (m, 2H), 2.04-2.16 (m, 5H),1.94-1.97 (m, 2H), 1.40 (s, 4H), 1.17 (s, 5H), 0.95 (d, J=6.6 Hz, 2.5H),0.91 (d, J=6.6 Hz, 2.5H), 0.86 (d, J=6.6 Hz, 0.5H), 0.81 (d, J=6.6 Hz,0.5H).

LCMS: Anal. Calcd. for C₄₀H₄₇N₉O₃: 701; found: 702 (M+H)⁺.

Example cj-6 and cj-7

Preparation of 1-Methyl-2-(methylthio)-4,5-dihydro-1H-imidazolehydroiodide

The title compound was prepared according to: Kister, J.; Assef, G.;Dou, H. J.-M.; Metzger, J. Tetrahedron 1976, 32, 1395. Thus, a solutionof N-methylethylenediamine (10.8 g, 146 mmol) in EtOH—H₂O (1:1, 90 mL)was preheated to 60° C. and CS₂ (9.0 mL, 150 mmol) was added dropwise.The resulting mixture was heated at 60° C. for 3 h and then conc. HCl(4.7 mL) was slowly added. The temperature was raised to 90° C. andstirring was continued for 6 h. After the cooled mixture had been storedat −20° C., it was filtered and the resulting solid dried in vacuo toafford 1-methylimidazolidine-2-thione (8.43 g, 50%) as a beige solid.

¹HNMR (400 MHz, CDCl₃) δ 5.15 (s, br, 1H), 3.67-3.70 (m, 2H), 3.53-3.58(m, 2H), 3.11 (s, 3H).

To a suspension of 1-methylimidazolidine-2-thione (5.17 g, 44.5 mmol) inacetone (50 mL) was added MeI (2.9 mL, 46.6 mmol). The solution wasallowed to stir at room temperature for 4 h and the resulting solid wasquickly filtered and then dried in vacuo to give1-methyl-2-(methylthio)-4,5-dihydro-1H-imidazole hydroiodide (8.79 g,77%) as beige solid.

¹HNMR (400 MHz, CDCl₃) δ 9.83 (s, br, 1H), 3.99-4.12 (m, 4H), 3.10 (s,3H), 2.99 (s, 3H).

Preparation of (S)-tert-Butyl2-(5-(4′-(2-((S)-1-((S)-3-methyl-2-(1-methyl-4-5-dihydroimidazol-2-ylamino)butanoyl)pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylate(cj-6)

A mixture of (s)-tert-butyl2-(5-(4′-(2-((S)-1-((S)-2-amino-3-methylbutanoyl)pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)-pyrrolidine-1-carboxylate(cj-2) (0.280 g, 0.448 mmol) and1-methyl-2-(methylthio)-4,5-dihydro-1H-imidazole hydroiodide (cj-3a)(0.121 g, 0.468 mmol) in CH₃CN (5 mL) was heated at 90° C. for 12 h.Another 0.030 g of 1-methyl-2-(methylthio)-4,5-dihydro-1H-imidazolehydroiodide (cj-3a) was added and heating continued for a further 12 h.The crude reaction mixture was directly purified by prep HPLC (LunaC-18/MeCN—H₂O-TFA) to give the TFA salt of the title compound (0.089 g)as a light yellow solid which was used as such in the subsequent steps.

LCMS: Anal. Calcd. for C₄₀H₅₁N₉O₃: 705; found: 706 (M+H)⁺.

Preparation of (S)-tert-Butyl2-(5-(4′-(2-((S)-1-((R)-3-methyl-2-(1-methyl-4-5-dihydroimidazol-2-ylamino)butanoyl)pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylate(cj-7)

The title compound was prepared from cj-3 according to the methoddescribed for the synthesis of cj-6, except that the reaction mixturewas initially purified by prep HPLC (YMC-Pack 25×250 mm/MeCN—H₂O—NH₄OAc)and then repurified by prep HPLC (Luna Phenyl-hexyl//MeCN—H₂O—NH₄OAc).This gave the desired product (0.005 g) as a foam which was used as suchin the subsequent steps.

LCMS: Anal. Calcd. for C₄₀H₅₁N₉O₃: 705; found: 706 (M+H)⁺.

Example cj-8 and cj-9

Preparation of (S)-tert-Butyl2-(5-(4′-(2-((S)-1-((S)-3-methyl-2-(3,4-dihydroimidazol-2-ylamino)butanoyl)pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylate(cj-8)

A mixture of (S)-tert-butyl2-(5-(4′-(2-((S)-1-((S)-2-amino-3-methylbutanoyl)pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylate(cj-2) (0.298 g, 0.480 mmol), 4,5-dihydro-1H-imidazole-2-sulfonic acid(AstaTech) (0.090 g, 0.60 mmol) and iPr₂NEt (0.083 mL, 0.48 mmol) inEtOH (4 mL) was heated at 100° C. for 12 h. The cooled mixture wasevaporated to dryness and the residue was purified by prep HPLC (Luna 5uC18/MeCN-H₂O-TFA, ×2) to afford the TFA salt of the title compound(0.390 g, 73%) as a light yellow solid.

¹HNMR (400 MHz, DMSO-d₆) δ 14.66 (br s, 2H), 8.51 (br s, 1H), 8.20 (d,J=10.1 Hz, 2H), 8.10 (br s, 1H), 7.82-7.91 (m, 7H), 7.30 (br s, 1H),5.12 (t, J=7.1 Hz, 1H), 4.97-5.05 (m, 2H), 4.37 (dd, J=4.3, 10.1 Hz,2H), 3.82-3.86 (m, 2H), 3.73-3.77 (m, 2H), 3.59 (s, 4H), 3.39-3.48 (m,2H), 2.15-2.25 (m, 2H), 1.93-2.07 (m, 5H), 1.40 (s, 4H), 1.17 (s, 5H),0.93 (d, J=6.6 Hz, 3H), 0.69 (br s, 3H).

LCMS: Anal. Calcd. for C₃₉H₄₉N₉O₃: 691; found: 692 (M+H)⁺.

Preparation of (S)-tert-Butyl2-(5-(4′-(2-((S)-1-((R)-3-methyl-2-(3,4-dihydroimidazol-2-ylamino)butanoyl)pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylate(cj-9)

The title compound was prepared from cj-3 according to the same methodused to prepare cj-8 to afford the TFA salt (0.199 g, 57%) as a yellowglass.

¹HNMR (400 MHz, DMSO-d₆) δ 14.58 (br s, 4H), 8.23 (d, J=9.6 Hz, 1H),8.11 (s, 1H), 7.87-7.89 (m, 6H), 7.25 (br s, 1H), 5.17-5.20 (m, 1H),4.96-5.04 (m, 1H), 4.37 (dd, J=5.5, 9.6 Hz, 1H), 3.91-3.95 (m, 2H),3.37-3.46 (m, partially obscured by H₂O, 4H), 2.39-2.42 (m, partiallyobscured by solvent, 2H), 2.01-2.09 (m, 4H), 1.94-1.98 (m, 2H), 1.40 (s,3H), 1.17 (s, 6H), 0.95 (d, J=6.5 Hz, 2.5H), 0.85 (d, J=6.5 Hz, 2.5H),0.66 (d, J=7.0 Hz, 0.5H), 0.54 (d, J=6.5 Hz, 0.5H).

LCMS: Anal. Calcd. for C₃₉H₄₉N₉O₃: 691; found: 692 (M+H)⁺.

Preparation of (S)-3-Methyl-2-(pyrimidin-2-ylamino)-1-((S)-2-(5-(4′-(2-((S)-pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)pyrrolidin-1-yl)butan-1-one(cj-10a).

Step 1: A solution of the TFA salt of (S)-tert-butyl2-(5-(4′-(2-((S)-1-((S)-3-methyl-2-(pyrimidin-2-ylamino)butanoyl)pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylate(cj-4) (0.208 g, 0.199 mmol) in a mixture CH₂Cl₂ (4 mL) and TFA (3 mL)was stirred at room temperature for 1.5 h. The solvents were thenremoved in vacuo and the residue was purified by prep HPLC (Luna 5uC18/MeCN-H₂O-TFA) to give the TFA salt of the title compound (0.391 g)as an orange gum.

¹HNMR (400 MHz, DMSO-d₆) δ 14.53 (br s, 3H), 9.52-9.57 (m, 2H),8.98-9.04 (m, 2H), 8.28 (d, J=4.6 Hz, 2H), 8.13 (br s, 1H), 7.79-7.91(m, 7H), 7.07 (d, J=8.1 Hz, 1H), 6.62 (app t, J=4.8 Hz, 1H), 5.07 (t,J=7.1 Hz, 1H), 4.72-4.78 (m, 2H), 4.48-4.51 (m, 1H), 4.08-4.12 (m, 2H),3.28-3.36 (m, 2H), 2.37-2.42 (m, 2H), 1.97-2.22 (m, 6H), 0.88 (app t,J=4.5 Hz, 6H).

LCMS: Anal. Calcd. for C₃₅H₃₉N₉O: 601; found: 602 (M+H)⁺.

Similarly, the following example was prepared according to therepresentative method above;

Example Structure LCMS cj-10a(from cj-3)

LCMS: Anal.Calcd. forC₃₅H₃₉N₉O: 601;found: 602(M + H)⁺.

Preparation ofmethyl((1S)-2-methyl-1-(((2S)-2-(5-(4′-(2-((2S)-1-(N-2-pyrimidinyl-L-valyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-4-biphenylyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)carbonyl)propyl)carbamate(cj-11)

methyl((1S)-2-methyl-1-(((2S)-2-(5-(4′-(2-((2S)-1-(N-2-pyrimidinyl-L-valyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-4-biphenylyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)carbonyl)propyl)carbamate

Step 2: To a solution of the TFA salt of(S)-3-methyl-2-(pyrimidin-2-ylamino)-1-((S)-2-(5-(4′-(2-((S)-pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)pyrrolidin-1-yl)butan-1-one(cj-10) (0.208 g, 0.197 mmol) in DMF (4 mL) was added iPr₂NEt (0.20 mL,1.15 mmol), (S)-2-(methoxycarbonylamino)-3-methylbutanoic acid (0.049 g,0.28 mmol) and HATU (0.105 g, 0.276 mmol). The solution was stirred for1.5 h at room temperature, diluted with MeOH (2 mL) and purifieddirectly by prep HPLC (Luna 5u C18/MeCN—H₂O—NH₄OAc). This material wasrepurified by flash chromatography (SiO₂/2-10% MeOH—CH₂Cl₂) to give asolid which was lyophilized from CH₃CN—H₂O to give the title compound(48.6 mg, 32%) as a colourless solid.

¹HNMR (400 MHz, DMSO-d₆) δ 11.78 (br s, 1H), 8.28 (d, J=4.5 Hz, 1H),7.76-7.79 (m, 4H), 7.66-7.69 (m, 4H), 7.48-7.51 (m, 2H), 7.29 (d, J=8.6Hz, 1H), 6.93 (d, J=8.1 Hz, 1H), 6.60 (app t, J=4.5 Hz, 1H), 5.03-5.09(m, 2H), 4.48 (t. J=8.1 Hz, 1H), 3.99-4.08 (m, 2H), 3.78-3.85 (m, 2H)3.53 (s, 3H), 2.12-2.21 (m, 4H), 1.87-2.05 (m, 7H), 0.83-0.97 (m, 12H).

LCMS: Anal. Calcd. for C₄₂H₅₀N₁₀O₄: 758; found: 759 (M+H)⁺.

Example-cj-13

Preparation ofMethyl(S)-1-((S)-2-(5-(4′-(2-((S)-1-((S)-2-amino-3-methylbutanoyl)pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)pyrrolidin-1-yl)-3-methyl-1-oxobutan-2-ylcarbamate(cj-13)

To a solution of methyl(S)-3-methyl-1-oxo-1-((S)-2-(5-(4′-(2-((S)-pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)pyrrolidin-1-yl)butan-2-ylcarbamate(cj-12) (1.16 g, 1.99 mmol), Z-Val-OH (0.712 g, 2.83 mmol) and iPr₂NEt(0.70 mL, 5.42 mmol) in DMF (40 mL) was added HATU (1.10 g, 2.89 mmol)portionwise. The mixture was allowed to stir at room temperature for 1 hand was then poured into ice-water (400 mL) and allowed to stand for 20min. The mixture was filtered and the solid washed with cold water andallowed to air dry overnight to give the Z-protected intermediate. LCMS:Anal. Calcd. for C₄₆H₅₄N₈O₆: 814; found: 815 (M+H)⁺.

The obtained solid was dissolved in MeOH (80 mL), 10% Pd—C (1.0 g) wasadded and the mixture was hydrogenated at room temperature andatmospheric pressure for 3 h. The mixture was then filtered and thefiltrate concentrated in vacuo. The resulting residue was purified byflash chromatography (SiO₂/5-20% MeOH—CH₂Cl₂) to afford the titlecompound (1.05 g, 77%) as a colorless foam. ¹HNMR (400 MHz, DMSO-d₆) δ11.75 (s, 1H), 7.75-7.79 (m, 3H), 7.61-7.67 (m, 5H), 7.49 (s, 1H),7.26-7.28 (m, 1H), 5.05-5.09 (m, 2H), 4.03-4.09 (m, 2H), 3.77-3.80 (m,1H), 3.66-3.70 (m, 1H), 3.52 (s, 3H), 3.40-3.47 (m, 2H), 2.21-2.26 (m,1H), 2.10-2.17 (m, 3H), 1.81-2.02 (m, 6H), 0.77-0.92 (m, 12H).

LCMS: Anal. Calcd. for C₃₈H₄₈N₈O₄: 680; found: 681 (M+H)⁺.

Example cj-15

Preparation ofMethyl(S)-1-((S)-2-(5-(4′-(2-((S)-1-((S)-2-((Z/E)-(cyanoimino)(phenoxy)methylamino)-3-methylbutanoyl)pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)pyrrolidin-1-yl)-3-methyl-1-oxobutan-2-ylcarbamate(cj-14)

A mixture of methyl(S)-1-((S)-2-(5-(4′-(2-((S)-1-((S)-2-amino-3-methylbutanoyl)pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)pyrrolidin-1-yl)-3-methyl-1-oxobutan-2-ylcarbamate(cj-13) (0.329 g, 0.527 mmol) and diphenyl cyanocarbonimidate (0.128 g,0.537 mmol) in iPrOH (10 mL) was stirred at room temperature for 12 h.The resulting solid was filtered and air-dried to give the titlecompound (0.187 g, 43%) as a cream-colored solid. This material was usedas such in the next step without further purification.

LCMS: Anal. Calcd. for C₄₆H₅₂N₁₀O₅: 824; found: 825 (M+H)⁺.

Preparation ofmethyl((1S)-1-(((2S)-2-(5-(4′-(2-((2S)-1-(N-(5-amino-1-methyl-1H-1,2,4-triazol-3-yl)-L-valyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-4-biphenylyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)carbonyl)-2-methylpropyl)carbamate(cj-15a, R═H)

A solution of methyl(S)-1-((S)-2-(5-(4′-(2-((S)-1-((S)-2-((Z/E)-(cyanoimino)(phenoxy)methylamino)-3-methylbutanoyl)pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)pyrrolidin-1-yl)-3-methyl-1-oxobutan-2-ylcarbamate(cj-14) (0.074 g, 0.090 mmol) and hydrazine hydrate (0.05 mL, 0.88 mmol)in iPrOH (2 mL) was heated at 75° C. for 7 h. The solvent was thenremoved in vacuo and the residue was purified by prep HPLC (Luna 5uC18/MeCN—H₂O—NH₄OAc) to give foam which was lyophilized from CH₃CN—H₂Oto give the title compound (0.032 g, 46%) as a colorless solid.

¹HNMR (400 MHz, DMSO-d₆) δ 12.17 (s, 1H), 11.75 (m, 2H), 10.66-10.84 (m,2H), 7.76-7.79 (m, 3H), 7.62-7.74 (m, 4H), 7.49-7.51 (m, 1H), 7.24-7.29(m, 2H), 5.28-5.32 (m, 1H), 5.05-5.08 (m, 2H), 4.04-4.09 (m, 3H),3.87-2.94 (m, 2H), 3.72-3.81 (m, 2H), 3.53 (s, 3H), 2.09-2.17 (m, 2H),1.90-2.02 (m, 6H), 0.81-0.99 (m, 12H).

LCMS: Anal. Calcd. for C₄₀H₅₀N₁₂O₄: 762; found: 763 (M+H)⁺.

Preparation ofMethyl(S)-1-((S)-2-(5-(4′-(2-((S)-1-((S)-2-(5-amino-1-methyl-1H-1,2,4-triazol-3-ylamino)-3-methylbutanoyl)pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)pyrrolidin-1-yl)-3-methyl-1-oxobutan-2-ylcarbamate(cj-15b, R=Me)

A solution of methyl(S)-1-((S)-2-(5-(4′-(2-((S)-1-((S)-2-((Z/E)-(cyanoimino)(phenoxy)methylamino)-3-methylbutanoyl)pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)pyrrolidin-1-yl)-3-methyl-1-oxobutan-2-ylcarbamate(cj-14) (0.105 g, 0.128 mmol) and N-methylhydrazine (0.010 mL, 0.188mmol) in iPrOH (2 mL) was heated at 75° C. for 3 h. A second portion ofN-methylhydrazine (0.010 mL, 0.188 mmol) was added and heating wascontinued for 7 h. The volatiles were then removed in vacuo and theresidue was purified by prep HPLC (Luna 5u C18/MeCN—H₂O—NH₄OAc) to givea foam which was further purified by flash chromatography (SiO₂/0-20%MeOH—CH₂Cl₂). The resulting material was lyophilized from CH₃CN—H₂O togive the title compound (0.029 g, 29%) as a colorless solid.

¹HNMR (400 MHz, DMSO-d₆) δ 13.79 (s, 0.4H), 12.19 (s, 1H), 11.76 (m,1.6H), 7.77-7.85 (m, 4H), 7.62-7.71 (m, 4H), 7.49-7.51 (m, 1H),7.24-7.29 (m, 1H), 6.31 (d, J=9.1 Hz, 0.5H), 6.09 (d, J=9.1 Hz, 1.5H),5.87 (s, 1H), 5.34-5.36 (m, 1H), 5.04-5.08 (m, 2H), 4.89 (s, 1H), 4.75(s, 2H), 3.53 (s, 3H), 2.10-2.17 (s, 3H), 1.94-2.02 (m, 6H), 0.81-0.98(m, 12H).

LCMS: Anal. Calcd. for C₄₁H₅₂N₁₂O₄: 776; found: 777 (M+H)⁺.

HRMS: Anal. Calcd. for C₄₁H₅₂N₁₂O₄: 776.4234; found: 777.4305 (M+H)⁺.

Example cj-16 and cj-17

Preparation ofmethyl((1S)-1-(((2S)-2-(5-(4′-(2-((2S)-1-(N-(5-amino-1,2,4-oxadiazol-3-yl)-L-valyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-4-biphenylyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)carbonyl)-2-methylpropyl)carbamate(cj-16)

A solution ofmethyl(S)-1-((S)-2-(5-(4′-(2-((S)-1-((S)-2-((Z/E)-(cyanoimino)(phenoxy)methylamino)-3-methylbutanoyl)pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)pyrrolidin-1-yl)-3-methyl-1-oxobutan-2-ylcarbamate(cj-14) (0.120 g, 0.205 mmol) and hydroxylamine hydrochloride (0.0213 g,0.307 mmol) in iPrOH (5 mL) was heated at 75° C. for 3 h. A secondportion of hydroxylamine hydrochloride (0.0213 g, 0.307 mmol) was addedand heating continued for 7 h. The volatiles were then removed in vacuoand the residue was purified by prep HPLC (Luna 5u C18/MeCN—H₂O—NH₄OAc)to give a foam which was further purified by flash chromatography(SiO₂/5% MeOH—CH₂Cl₂). The resulting colorless wax was lyophilized fromCH₃CN—H₂O to give the title compound (0.0344 g, 22%) as a colorlesssolid.

¹HNMR (400 MHz, DMSO-d₆) δ 12.18-12.22 (m, 1H), 11.80 (s, 1H), 11.75 (s,1 h), 8.03-8.06 (m, 1H), 7.77 (app d, J=8.1 Hz, 2H), 7.62-7.73 (m, 4H),7.50 (dd, J=2.0, 5.5 Hz, 1H), 7.24-7.29 (m, 2H), 5.69 (s, 1H), 5.06-5.11(m, 2H), 4.14 (t, J=8.6 Hz, 1H), 4.06 (unresolved dd, J=8.0, 8.6 Hz,1H), 3.78-3.90 (m, 3H), 3.53 (s, 3H), 3.01 (br s, 2H), 2.10-2.19 (m,3H), 1.90-2.04 (m, 5H), 0.81-0.96 (m, 12H).

LCMS: Anal. Calcd. for C₄₀H₄₉N₁₁O₅: 763; found: 764 (M+H)⁺.

Preparation ofmethyl((1S)-1-(((2S)-2-(5-(4′-(2-((2S)-1-(N-(cyano(dimethyl)carbamimidoyl)-L-valyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-4-biphenylyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)carbonyl)-2-methylpropyl)carbamate(cj-17)

A solution of methyl(S)-1-((S)-2-(5-(4′-(2-((S)-1-((S)-2-((Z/E)-(cyanoimino)(phenoxy)methylamino)-3-methylbutanoyl)pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)pyrrolidin-1-yl)-3-methyl-1-oxobutan-2-ylcarbamate(cj-14) (0.115 g, 0.198 mmol) and dimethylamine hydrochloride (0.0257 g,0.315 mmol) in iPrOH (5 mL) was heated at 90° C. for 12 h. A secondportion of dimethylamine hydrochloride (0.0257 g, 0.315 mmol) was addedand heating was continued for 48 h. The volatiles were then removed invacuo and the residue was purified by prep HPLC (Luna 5uC18/MeCN—H₂O—NH₄OAc) and then repurified by flash chromatography(SiO₂/5% MeOH—CH₂Cl₂). The resulting colorless wax was lyophilized fromCH₃CN—H₂O to give the title compound (0.0318 g, 21%) as a colorlesssolid.

¹HNMR (400 MHz, DMSO-d₆) δ 12.22 (m, 0.6H), 11.81 (s, 1H), 11.75 (s,1H), 12.17-12.22 (m, 0.5H), 11.99-12.04 (m, 0.5H), 11.75-11.81 (m, 1H),7.76-7.79 (m, 3H), 7.62-7.73 (m, 5H), 7.50 (t, J=2.0 Hz, 1H), 7.23-7.29(m, 1H), 6.64 (d, J=8.1 Hz, 1H), 5.06-5.08 (m, 2H), 4.47 (t, J=8.1 Hz,2H), 4.06 (unresolved dd, J=8.0, 8.6 Hz, 1H), 3.84-3.90 (m, 2H),3.76-3.82 (m, 3H), 3.53 (s, 3H), 3.00 (s, 6H), 2.11-2.20 (m, 3H),1.90-2.04 (m, 5H), 0.97 (d, J=6.5 Hz, 3H), 0.89-0.91 (m, 6H), 0.84 (d,J=6.5 Hz, 3H).

LCMS: Anal. Calcd. for C₄₂H₅₃N₁₁O₄: 775; found: 776 (M+H)⁺

Preparation ofMethyl(S)-3-methyl-1-oxo-1-((S)-2-(5-(4′-(2-((S)-pyrrolidin-2-yl)-1H-imidazol-5-yl)biphenyl-4-yl)-1H-imidazol-2-yl)pyrrolidin-1-yl)butan-2-ylcarbamate(cj-12)

Synthesized from Intermediate-28d and Cap-51 as in Example 28e, followedby Boc removal with TFA/CH₂Cl₂ and free base formation with MCX resin.

¹HNMR (400 MHz, MeOH-d₄) δ 7.79-7.82 (m, 3H), 7.65-7.75 (m, 5H), 7.48(s, 1H), 7.32 (s, 1H), 5.19 (dd, J=5.5, 5.7 Hz, 1H), 4.75 (t, J=7.8 Hz,1H), 4.25 (d, J=7.3 Hz, 1H), 3.88-4.04 (m, 2H), 3.67 (s, 3H), 3.35-3.51(m, 3H), 2.43-2.51 (m, 1H), 2.02-2.38 (m, 7H), 0.97 (d, J=6.5 Hz, 3H),0.92 (d, J=6.9 Hz, 3H).

LCMS: Anal. Calcd. for C₃₃H₃₉N₇O₃: 581; found: 582 (M+H)⁺.

Section OL LC Conditions:

Condition 1: Solvent A: 5% acetonitrile/95% water/10 mmol ammoniumacetate; Solvent B: 95% acetonitrile/5% water/10 mmol ammonium acetate;Column: Phenomenex GEMINI 5u C18 4.6×5.0 mm; Wavelength: 220 nM; Flowrate: 4 ml/min; 0% B to 100% B over 3 min with a 1 min hold time.

Condition 2: Solvent A: 5% acetonitrile/95% water/10 mmol ammoniumacetate; Solvent B: 95% acetonitrile/5% water/10 mmol ammonium acetate;Column: Phenomenex GEMINI 5u C18 4.6×5.0 mm; Wavelength: 220 nM; Flowrate: 4 ml/min; 0% B to 100% B over 2 min with a 1 min hold time

Condition 3: Solvent A: 5% acetonitrile/95% water/10mmol ammoniumacetate; Solvent B: 95% acetonitrile/5% water/10mmol ammonium acetate;Column: Phenomenex GEMINI 5u C18 4.6×5.0 mm; Wavelength: 220 nM; Flowrate: 4 ml/min; 0% B to 100% B over 4 min with a 1 min hold time

Condition 4: Solvent A: 10% MeOH/90% water/0.1% TFA; Solvent B: 90%MeOH/10% water/0.1% TFA; Column: Phenomenex 10u C18 3.0×5.0 mm;Wavelength: 220nM; Flow rate: 4 ml/min; 0% B to 100% B over 4 min with a1 min hold time

Condition 5: Solvent A: 5% acetonitrile/95% water/10 mmol ammoniumacetate; Solvent B: 95% acetonitrile/5% water/10mmol ammonium acetate;Column: Phenomenex GEMINI 5u C18 4.6×5.0 mm; Wavelength: 220 nM; Flowrate: 4 ml/min; 0% B to 100% B over 9 min with a 1 min hold time

Condition 6: Solvent A: 10% MeOH/90% water/0.2% H₃PO₄; Solvent B: 90%MeOH/10% water/0.2% H₃PO₄; Column: Phenomenex 5u C-18 4.6×50 mm;Wavelength: 220 nM; Flow rate: 1.5 ml/min; 0% B to 100% B over 14 minwith a 3 min hold time

Condition 7: Solvent A: 10% MeOH/90% water/0.1% TFA; Solvent B: 90%MeOH/10% water/0.1% TFA; Column: Phenomenex 10u C18 3.0×5.0 mm;Wavelength: 220 nM; Flow rate: 4 ml/min; 0% B to 100% B over 3 min witha 1 min hold time

Condition 8: Solvent A: 10% MeOH/90% water/0.1% TFA; Solvent B: 90%MeOH/10% water/0.1% TFA; Column: Phenomenex 10u C18 3.0×5.0 mm;Wavelength: 220 nM; Flow rate: 4 ml/min; 0% B to 100% B over 2 min witha 1 min hold time

Experimentals Caps:

Step a: Dimethylcarbamoyl chloride (0.92 mL, 10 mmol) was added slowlyto a solution of (S)-benzyl 2-amino-3-methylbutanoate hydrochloride(2.44 g; 10 mmol) and Hunig's base (3.67 mL, 21 mmol) in THF (50 mL).The resulting white suspension was stirred at room temperature overnight(16 hours) and concentrated under reduced pressure. The residue waspartitioned between ethyl acetate and water. The organic layer waswashed with brine, dried (MgSO₄), filtered, and concentrated underreduced pressure. The resulting yellow oil was purified by flashchromatography, eluting with ethyl acetate:hexanes (1:1). Collectedfractions were concentrated under vacuum providing 2.35 g (85%) ofIntermediate Cap OL-1 as a clear oil. ¹H NMR (300 MHz, DMSO-d₆) δ ppm0.84 (d, J=6.95 Hz, 3H) 0.89 (d, J=6.59 Hz, 3H) 1.98-2.15 (m, 1H) 2.80(s, 6H) 5.01-5.09 (m, J=12.44 Hz, 1H) 5.13 (d, J=12.44 Hz, 1H) 6.22 (d,J=8.05 Hz, 1H) 7.26-7.42 (m, 5H). LC (Cond. 1): RT=1.76 min; MS: Anal.Calcd. for [M+H]⁺ C₁₆H₂₂N₂O₃: 279.17; found 279.03.

Step b: To Intermediate Cap OL-1 (2.35 g; 8.45 mmol) in 50 ml MeOH wasadded Pd/C (10%; 200 mg) and the resulting black suspension was flushedwith N₂ (3×) and placed under 1 atm of H₂. The mixture was stirred atroom temperature overnight and filtered though a microfiber filter toremove the catalyst. The resulting clear solution was then concentratedunder reduced pressure to obtain 1.43 g (89%) of Cap OL-2 as a whitefoam, which was used without further purification. ¹H NMR (500 MHz,DMSO-d₆) δ ppm 0.87 (d, J=4.27 Hz, 3H) 0.88 (d, J=3.97 Hz, 3H) 1.93-2.11(m, 1H) 2.80 (s, 6H) 3.90 (dd, J=8.39, 6.87 Hz, 1H) 5.93 (d, J=8.54 Hz,1H) 12.36 (s, 1H).). LC (Cond. 1): RT=0.33 min; MS: Anal. Calcd. for[M+H]⁺ C₈H₁₇N₂O₃: 1898.12; found 189.04.

Cap OL-3 was prepared from (S)-benzyl 2-aminopropanoate hydrochlorideaccording to the method described for Cap OL-2. ¹H NMR (500 MHz,DMSO-d₆) δ ppm 1.27 (d, J=7.32 Hz, 3H) 2.80 (s, 6H) 4.06 (qt, 1H) 6.36(d, J=7.32 Hz, 1H) 12.27 (s, 1H), LC (Cond. 1): RT 32 0.15 min; MS:Anal. Calcd. for [M+H]⁺ C₆H₁₃N₂O₃: 161.09; found 161.00.

Cap OL-4 was prepared from (S)-tert-butyl 2-amino-3-methylbutanoatehydrochloride and 2-fluoroethyl chloroformate according to the methoddescribed for Cap-47. ¹HNMR (500 MHz, DMSO-d₆) δ ppm 0.87 (t, J=6.71 Hz,6H) 1.97-2.10 (m, 1H) 3.83 (dd, J=8.39, 5.95 Hz, 1H) 4.14-4.18 (m, 1H)4.20-4.25 (m, 1H) 4.50-4.54 (m, 1H) 4.59-4.65 (m, 1H) 7.51 (d, J=8.54Hz, 1H) 12.54 (s, 1H)

Cap OL-5 was prepared from (S)-diethyl alanine and methyl chloroformateaccording to the method described for Cap-51. ¹H NMR (500 MHz, DMSO-d₆)δ ppm 0.72-0.89 (m, 6H) 1.15-1.38 (m, 4H) 1.54-1.66 (m, 1H) 3.46-3.63(m, 3H) 4.09 (dd, J=8.85, 5.19 Hz, 1H) 7.24 (d, J=8.85 Hz, 1H) 12.55 (s,1H). LC (Cond. 2): RT=0.66 min; MS: Anal. Calcd. for [M+H]⁺ C₉H₁₈NO₄:204.12; found 204.02.

Analytical Data (Cond 1: 3 min Ex- gradient, am- 4 min run; ple Cond 2:2 min Num- Compound gradient, ber Name Heterocycles with New Caps 3 minrun) D71tert-butyl(2S)-2-(5-(2-(4-(2-((2S)-1-((2R)-2-(diethyl-amino)-2-phenyl-acetyl)-2-pyrroli-dinyl)-1H-imidazol-5-yl)phenyl)-5-pyrimi-dinyl)-1H-imida-zol-2-yl)-1-pyrrolidine-carboxylate

t_(R) = 1.82 min,(97.7%),(Cond 1)LRMS: Anal.Calcd.forC₄₁H₅₀N₉O₃716.40;found:716.44(M + H)⁺.HRMS:Anal.Calcd.forC₄₁H₅₀N₉O₃716.4037;found:716.4056(M + H)⁺. D72(1R)-N,N-diethyl-2-oxo-1-phenyl-2-((2S)-2-(5-(4-(5-(2-((2S)-2-pyrroli-dinyl)-1H-imi-dazol-5-yl)-2-pyrimi-dinyl)phenyl)-1H-imidazol-2-yl)-1-pyrroli-dinyl)ethana-mine

t_(R) = 1.56 min,(~95.3%, hasshoulder),(Cond 1)LRMS: Anal.Calcd.forC₃₆H₄₂N₉O616.35; found:616.37(M + H)⁺.HRMS:Anal. Calcd.forC₃₆H₄₂N₉O616.3512;found;616.3540(M + H)⁺. D73 methyl((1S)-2-((2S)-2-(5-(4-(5-(2-((2S)-1-(N-(methoxy-carbonyl)-L-alanyl)-2-pyrroli-dinyl)-1H-imida-zol-5-yl)-2-pyrimi-dinyl)phenyl)-1H-imidazol-2-yl)-1-pyrroli-dinyl)-1-methyl-2-oxoeth-yl)carbamate

t_(R) = 1.52min,(96.2%),(Cond 1)LRMS:Anal. Calcd.forC₃₄H₄₁N₁₀O₆685.32;found:685.21(M + H)⁺.HRMS:Anal.Calcd.forC₃₄H₄₁N₁₀O₆685.3211;found:685.3196(M + H)⁺. D74 methyl((1S)-1-(((2S)-2-(5-(2-(4-(2-((2S)-1-((2S)-2-((methoxy-carbonyl)amino)-3-methyl-butanoyl)-2-pyrroli-dinyl)-1H-imidazol-5-yl)phenyl)-5-pyrimi-dinyl)-1H-imida-zol-2-yl)-1-pyrroli-dinyl)carbon-yl)-2-methylpro-pyl)carba-mate

t_(R) = 2.09min, (95%),(Cond 1)LRMS:Anal. Calcd.forC₃₈H₄₉N₁₀O₆741.38;found:741.26(M + H)⁺.HRMS:Anal.Calcd.forC₃₈H₄₉N₁₀O₆741.3837;found:741.3824(M + H)^(+.) D75 methyl((1S)-1-cyclopropyl-2-((2S)-2-(5-(2-(4-(2-((2S)-1-((2S)-2-cyclopropyl-2-((methoxy-carbonyl)amino)ace-tyl)-2-pyrroli-dinyl)-1H-imidazol-5-yl)phenyl)-5-pyrimi-dinyl)-1H-imida-zol-2-yl)-1-pyrroli-dinyl)-2-oxoeth-yl)carbamate

t_(R) = 1.98min, (95%),(Cond 1)LRMS:Anal.Calcd.forC₃₈H₄₅N₁₀O₆737.35;found:737.22(M + H)⁺.HRMS:Anal.Calcd.forC₃₈H₄₅N₁₀O₆737.3524;found:737.3555(M + H)⁺. D76 methyl((1S)-1-(((2S)-2-(5-(2-(4-(2-((2S)-1-((2R)-2-(diethyl-amino)-2-phenyl-acetyl)-2-pyrroli-dinyl)-1H-imidazol-5-yl)phenyl)-5-pyrimi-dinyl)-1H-imida-zol-2-yl)-1-pyrroli-dinyl)carbon-yl)-2-methylpro-pyl)carba-mate

t_(R) = 1.69min, (95%),(Cond 1)LRMS:Anal. Calcd.forC₄₃H₅₃N₁₀O₄773.43;found:773.30(M + H)⁺.HRMS:Anal.Calcd.forC₄₃H₅₃N₁₀O₄773.4251;found:773.4280(M + H)⁺. D77 methyl((1S)-2-((2S)-2-(5-(2-(4-(2-((2S)-1-((2R)-2-(diethyl-amino)-2-phenyl-acetyl)-2-pyrroli-dinyl)-1H-imidazol-5-yl)phenyl)-5-pyrimi-dinyl)-1H-imida-zol-2-yl)-1-pyrrolidinyl)-1-methyl-2-oxoeth-yl)carbamate

t_(R) = 1.81 min,(97.5%),(Cond 1)LRMS:Anal. Calcd.forC₄₁H₄₉N₁₀O₄745.39;found:745.27(M + H)⁺.HRMS:Anal.Calcd.forC₄₁H₄₉N₁₀O₄745.3938;found:745.3939(M + H)⁺.

Section J Ex- am- ple Num- ber Compound Name Structure Analytical DataJ.1a

t_(R) = 1.7 min,(Cond2);LCMS:C₁₀H₉BrO₃found:257 (M + H)⁺. J.1b

t_(R) = 1.9 min,(Cond2);LCMS:C₁₁H₁₁BrO₃found:271 (M + H)⁺. J.1c

t_(R) = 2.1 min,(Cond2);LCMS:C₁₆H₁₃BrO₃found:332 (M + H)⁺. J1

t_(R) = 2.2 min,(Cond2);LCMS:C₂₀H₂₄BrNO₇found:470 (M + H)⁺. J2

t_(R) = 2.2 min,(Cond2);LCMS:C₂₁H₂₆BrNO₇found:484 (M + H)⁺. J3

t_(R) = 2.3 min,(Cond2);LCMS:C₂₆H₂₈BrNO₇found:546 (M + H)⁺. J4

t_(R) = 1.84 min,(100%)(Cond 2);LRMS:Anal. Calcd.forC₂₀H₂₄BrN₃O₄;450.10;found:450.13and 452.13(M + H)⁺. J5

t_(R) = 1.93 min,(99%)(Cond 2);Reported in J5. J6

t_(R) = 2.1 min,(93%)(Cond 2);LRMS:Anal. Calcd.forC₂₆H₂₉BrN₃O₄526.13;found:526.16and 528.16(M + H)⁺. J7

t_(R) = 1.7 min,(100%)(Cond 2);Reported in J7. J32

t_(R) = 1.96 min,(96%)(Cond 2);LRMS:Anal. Calcd.forC₁₁H₁₁BrF₃N₂O323.00;found:323.05and 325.05(M + H)⁺.¹H NMR(300 MHz,DMSO-d₆)δ7.58(d,J=8.4Hz,2H), 7.21(d,J=8.4Hz, 2H),3.06(s, 6H). J32.a

t_(R) = 2.19 min,(96%)(Cond 2);Reported in J32.a J32.b

t_(R) = 2.3 min,(73%)(Cond 2);LCMS:C₂₅H₃₄BF₃N₃O₄found:508 (M + H)⁺.J33.a tert-butyl(2S)-2-(5-(4′-(2-((1S)-1-((tert-butoxy-carbonyl)(meth-yl)amino)ethyl)-1H-imida-zol-5-yl)-4-biphenylyl)-4-(trifluoromethyl)-1H-imida-zol-2-yl)-1-pyrrolidine-carboxylate

t_(R) = 1.97min, (97%)(Cond 2);LRMS:Anal. Calcd.forC₃₆H₄₄F₃N₆O₄681.34;found:681.31 (M + H)⁺.HRMS:Anal. Calcd.forC₃₆H₄₄F₃N₆O₄681.3376;found:681.3383(M + H)⁺. J34.a tert-butyl(2S)-2-(5-(4-(5-(2-((2S)-1-(tert-butoxy-carbonyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyrimi-dinyl)phenyl)-4-(trifluoromethyl)-1H-imida-zol-2-yl)-1-pyrrolidine-carboxylate

t_(R) = 1.97 min,(93%)(Cond 2);LRMS:Anal. Calcd.forC₃₅H₄₂F₃N₈O₄695.33;found:695.28 (M + H)⁺. J35.a

LCMS:C₂₆H₂₈F₃N₆found:481 (M + H)⁺. J36.a

t_(R) = 1.45min, (Cond2);LCMS:C₂₅H₂₆F₃N₈found:495 (M + H)⁺. J42.a methyl((1S)-2-((2S)-2-(5-(4′-(2-((1S)-1-((N-(methoxy-carbonyl)-L-alanyl)(meth-yl)ami-no)ethyl)-1H-imidazol-5-yl)-4-biphenylyl)-4-(trifluoromethyl)-1H-imida-zol-2-yl)-1-pyrrolidinyl)-1-methyl-2-oxoeth-yl)carbamate

t_(R) = 1.69 min,(100%) (Cond 2);LRMS:Anal. Calcd.forC₃₆H₄₂F₃N₈O₆739.32;found:739.31 (M + H)⁺.HRMS:Anal. Calcd.forC₃₆H₄₂F₃N₈O₆739.3179;found:739.3195(M + H)⁺. J46 methyl((1R)-2-((2S)-2-(5-(4-(5-(2-((2S)-1-((2R)-2-((methoxy-carbonyl)amino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyrimi-dinyl)phenyl)-4-(trifluoromethyl)-1H-imida-zol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenyleth-yl)carbamate

t_(R) = 1.82min, (98%)(Cond 2);LRMS:Anal. Calcd.forC₄₅H₄₄F₃N₁₀O₆877.34;found:877.29 (M + H)⁺.HRMS:Anal. Calcd.forC₄₅H₄₄F₃N₁₀O₆877.3397;found:877.3403(M + H)⁺. J47(1R)-2-((2S)-2-(5-(4-(5-(2-((2S)-1-((2R)-2-(diethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyrimi-dinyl)phenyl)-4-(trifluoromethyl)-1H-imida-zol-2-yl)-1-pyrrolidinyl)-N,N-dieth-yl-2-oxo-1-phenylethanamine

t_(R) = 1.58 min,(97%)(Cond 2);LRMS:Anal. Calcd.forC₄₉H₅₆F₃N₁₀O₂873.44;found:873.40 (M + H)⁺.HRMS:Anal. Calcd.forC₄₉H₅₆F₃N₁₀O₂873.4540;found:873.4536(M + H)⁺. J48 methyl((1S)-1-(((2S)-2-(5-(2-(4-(2-((2S)-1-((2S)-2-((methoxy-carbonyl)amino)-3-methyl-butanoyl)-2-pyrrolidinyl)-4-(trifluoromethyl)-1H-imidazol-5-yl)phenyl)-5-pyrimidinyl)-1H-imidazol-2-yl)-1-pyrroli-dinyl)carbon-yl)-2-methylpro-pyl)carba-mate

t_(R) = 1.85min, (99%)(Cond 2);LRMS:Anal. Calcd.forC₃₉H₄₈F₃N₁₀O₆809.37;found:809.37 (M + H)⁺.HRMS:Anal.Calcd.forC₃₉H₄₈F₃N₁₀O₆809.3710;found:809.3683(M + H)⁺. J49 methyl((1S)-1-cyclopropyl-2-((2S)-2-(5-(4-(5-(2-((2S)-1-((2S)-2-cyclopropyl-2-((methoxy-carbonyl)amino)acetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyrimi-dinyl)phenyl)-4-(trifluoromethyl)-1H-imida-zol-2-yl)-1-pyrrolidinyl)-2-oxoeth-yl)carbamate

t_(R) = 1.75 min,(100%) (Cond 2);LRMS:Anal.Calcd.forC₃₉H₄₄F₃N₁₀O₆805.34; found:805.34 (M + H)⁺.HRMS:Anal.Calcd.forC₃₉H₄₄F₃N₁₀O₆805.3397; found:805.3384(M + H)⁺. J50 methyl((1S)-2-((2S)-2-(5-(4-(5-(2-((2S)-1-(N-(methoxy-carbonyl)-L-alanyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyrimi-dinyl)phenyl)-4-(trifluoromethyl)-1H-imida-zol-2-yl)-1-pyrrolidinyl)-1-methyl-2-oxoeth-yl)carbamate

t_(R) = 1.61min, (94%)(Cond 2);LRMS:Anal. Calcd.forC₃₅H₄₀F₃N₁₀O₆753.31;found:753.31 (M + H)⁺.HRMS:Anal. Calcd.forC₃₅H₄₀F₃N₁₀O₆753.3084;found:753.3099(M + H)⁺. J51(2R)-1-((2S)-2-(5-(4-(5-(2-((2S)-1-((2R)-2-(diethyl-amino)prop-anoyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyrimi-dinyl)phenyl)-4-(trifluoromethyl)-1H-imida-zol-2-yl)-1-pyrrolidinyl)-N,N-dieth-yl-1-oxo-2-propanamine

t_(R) = 1.41 min,(92%)(Cond 2);LRMS:Anal. Calcd.forC₃₉H₅₂F₃N₁₀O₂749.42;found:749.37 (M + H)⁺.HRMS:Anal. Calcd.forC₃₉H₅₂F₃N₁₀O₂749.4227;found:749.4223(M + H)⁺.

Cond 1: LCMS conditions: Phenomenex-Luna 4.6×50 mm S10, 0 to 100% B over3 min, 4 min stop time, 4 mL/min, 220 nm, A: 10% MeOH-90% H2O-0.1% TFA;B: 90% MeOH-10% H2O-0.1% TFA

Cond 2: LCMS conditions: Phenomenex-Luna 4.6×50 mm S10, 0 to 100% B over2 min, 3 min stop time, 4 mL/min, 220 nm, A: 10% MeOH-90% H2O-0.1% TFA;B: 90% MeOH-10% H2O-0.1% TFA

Example J2 (2S)-2-(1-(4-bromophenyl)-3-ethoxy-1,3-dioxopropan-2-yl)1-tert-butyl pyrrolidine-1,2-dicarboxylate

The ethyl 3-(4-bromophenyl)-3-oxopropanoate (15 g, 55 mmol) wasdissolved in CH₂Cl₂ (600 mL) and freshly recrystallized NBS (9.8 g, 55mmol) was added and the solution stirred 18 hr. The reaction mixture waswashed with NaHCO₃ solution, brine, and dried (MgSO₄), filtered, andconcentrated to give a residue which was not purified. Ethyl2-bromo-3-(4-bromophenyl)-3-oxopropanoate (16.5 g, 48 mmol) andN-Boc-L-proline (10 g, 48 mmol) were taken up in acetonitrile (450 mL)and Hunig's base (16 mL, 95 mmol) was added and the solution stirred 18hr. The solvent was removed by rotorary evaporation and the residuetaken up in ethyl acetate, washed with 0.1 N HCl, and brine. ¹H NMR (300MHz, DMSO-d₆) δ 7.95 (d, J=8.4 Hz, 2H), 7.79 (d, J=8.4 Hz, 2H),6.68-6.65 (m, 1H), 4.39-4.30 (m, 1H), 4.21-4.12 (m, 2H), 2.27-2.21 (m,1H), 2.0-1.95 (m, 1H), 1.90-1.76 (m, 2H), 1.39 (s, 2H), 1.31 (s, 9H),1.11 (t, J=7.3 Hz, 3H).

LRMS: Anal. Calcd. for C₂₁H₂₆BrNO₇ 484.09; found: 410.08 (M+H)⁺.

Example J5 (S)-ethyl5-(4-bromophenyl)-2-(1-(tert-butoxycarbonyl)pyrrolidin-2-yl)-1H-imidazole-4-carboxylate

A 1 L pressure bottle was charged with(2S)-2-(1-(4-bromophenyl)-3-ethoxy-1,3-dioxopropan-2-yl) 1-tert-butylpyrrolidine-1,2-dicarboxylate J2 (7 g, 35 mmol) and 11 g of NH₄OAc in125 mL of Xylene, and the reaction was heated at 140° C. for 3.5 hr.After being cooled, the solution was partition between ethyl actate andwater. The organic layer was concentrated and the resultant residueapplied to a Biotage 40 m silica gel cartridge and eluted by 20-100%gradient, ethyl acetate/Hex to give 3 g (45%). ¹H NMR (300 MHz, CDCl₃) δ12.75 (br. s, 7.82), (br. s, 2H), 7.50 (d, J=8.4 Hz, 2H), 4.96-4.92 (m,1H), 4.23 (q, J=6.6 Hz, 2H), 3.68-3.50 (m, 1H), 3.40-3.32 (m, 1H),2.19-2.15 (m, 1H), 1.99-1.89 (m, 3H), 1.48/1.13 (s, 9H), 1.23 (t, J=7.3Hz, 3H). LRMS: Anal. Calcd. for C₂₁H₂₆BrN₃O₄ 464.12; found: 464.15 and466.15 (M+H)⁺.

Example J7 (S)-tert-butyl2-(5-(4-bromophenyl)-4-(methylcarbamoyl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylate

(S)-ethyl5-(4-bromophenyl)-2-(1-(tert-butoxycarbonyl)pyrrolidin-2-yl)-1H-imidazole-4-carboxylate(1 g, 2.1 mmol) was dissolved in 2M methylamine in MeOH (35 mL) andheated in a pressure vessel at 70° C. for 48 h. The reaction mixture wasconcentrated and the residue applied to a Biotage 25 m silica gelcartridge and eluted by 10-100% gradient, ethyl acetate/Hex to give 556mg (57%). ¹H NMR (300 MHz, DMSO-d₆) δ 12.5 (br.s, 1H), 7.86-7.82 (m,1H), 7.77 (d, J=8.4 Hz, 2H), 7.61 (d, J=8.7 Hz, 2H), 4.83-4.70 (m, 1H),3.69-3.52 (br.s, 1H), 3.42-3.32 (m, 1H), 2.71 (d, 4.8 Hz, 3H), 2.30-1.78(m, 4H), 1.19-1.14 (m, 9H).

LRMS: Anal. Calcd. for C₂₀H₂₆BrN₄O₃ 449.12; found: 449.15 and 451.14(M+H)⁺.

Example J32.a (S)-tert-butyl2-(5-(4-bromophenyl)-4-(trifluoromethyl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylate

3-(4-bromophenyl)-3-(2,2-dimethylhydrazono)-1,1,1-trifluoropropan-2-one(2.0 g, 6.2 mmol) was suspended in 5N sulfuric acid (60 mL) and heatedat 45° C. for 6 h. The temperature was raised to 85° C. for 2 h, andupon cooling a precipitate formed. This material which was isolated byfiltration to give 1-(4-bromophenyl)-3,3,3-trifluoropropane-1,2-dione1.6 g (92%) as a yellow solid. The dione (1.6 g, 5.7 mmol) was taken upin methanol (30 mL), N-(tert-butoxycarbonyl)-L-prolinal (1 g, 5.0 mmol)was added, followed by addition of 28% ammonium hydroxide solution (10mL). The reaction was stirred at room temperature for 18 h, poured ontodichloromethane (200 mL), washed with water and dried with MgSO₄.Filtration, concentration and application to a 40 M Biotage cartridge,gradient elution with 5%-30% ethyl acetate/Hexanes, gave J32.a 1.3 g(50%). ¹H NMR (300 MHz, DMSO-d₆) δ 12.88 (br.s, 1H), 7.72 (d, J=8.4 Hz,2H), 7.39 (d, J=8.0 Hz, 2H), 4.84-4.70 (m, 1H), 3.57-3.49 (m, 1H),3.39-3.29 (m, 1H), 2.31-2.20 (m, 1H), 1.98-1.78 (m, 3H), 1.39/1.13 (m,9H). LRMS: Anal. Calcd. for C₁₉H₂₀BrF₃N₃O₂ 458.07; found: 458.06 and460.06 (M−H)⁻. HRMS: Anal. Calcd. for C₁₉H₂₂BrF₃N₃O₂ 460.0847; found:460.0866 and 462.0840 (M+H)⁺.

Section D

Compound Entry Name Structure **Data D1

t_(R) = 2.65 min, (86.7%)LCMS: Anal.Calcd. forC₈H₁₅BrFO296.88;found:296.91 (M + H)⁺. D2

t_(R) = 2.66 min, (80%)LCMS: Anal.Calcd. forC₈H₄BrClFO 270.92;found:ND(M + H)⁺. D3

t_(R) = 2.57 min, (95%)LCMS: Anal.Calcd. forC₉H₉BrO₂ 228.99;found:229.00(M + H)⁺. D4

t_(R) = 2.38 min, (95.0%)LRMS: Anal.Calcd. forC₁₉H₂₀ ⁷⁹BrFN₃O₂444.07;found:444.04 (M + H)⁺.HRMS: Anal.Calcd. forC₁₉H₂₀⁷⁹BrFN₃O₂444.0721;found: 444.0736(M + H)⁺ D5

t_(R) = 2.27 min, (95%)LRMS: Anal.Calcd. forC₁₈H₂₂BrFN₃O₂ 410.09and412.08;found: 410.08 and412.08 (M + H)⁺.HRMS: Anal.Calcd. forC₁₈H₂₂⁷⁹BrFN₃O₂410.0879;found: 410.0893(M + H)⁺. D6

t_(R) = 2.26 min, (95%)LRMS: Anal.Calcd. forC₁₉H₂₅BrN₃O₃ 422.11and424.11;found: 422.10 and424.10 (M + H)⁺.HRMS: Anal.Calcd. forC₁₉H₂₅⁷⁹BrN₃O₃422.1079;found: 422.1089(M + H)⁺. D7

t_(R) = 2.28 min, (95%)LRMS: Anal.Calcd. forC₁₈H₂₁ClF₂N₃O₂384.13;found:384.13 (M + H)⁺.HRMS: Anal.Calcd.forC₁₈H₂₁ClF₂N₃O₂384.1290;found: 384.1301(M + H)⁺. D8

t_(R) = 2.62 min,(~50%) and1.95 min(~50%, boronicacid)LRMS:Anal. Calcd.forC₂₄H₃₄BFN₃O₄ 458.26;found:458.23 (M + H)⁺.HRMS:Anal. Calcd.forC₂₄H₃₄BFN₃O₄458.2626;found: 458.2610(M + H)⁺. D13tert-butyl(2S)-2-(5-(2-(4-(2-((2S)-1-(tert-butoxy-carbonyl)-2-pyrroli-dinyl)-1H-imida-zol-4-yl)-3-fluoro-phenyl)-5-pyrimi-dinyl)-1H-imida-zol-2-yl)-1-pyrrolidine-carboxylate

t_(R) = 2.27 min,(95%)LRMS: Anal.Calcd. forC₃₄H₄₂FN₈O₄645.33;found:645.34 (M + H)⁺.HRMS: Anal.Calcd.forC₃₄H₄₂FN₈O₄645.3313;found: 645.3323(M + H)⁺. D322-(3-fluoro-4-(2-((2S)-2-pyrroli-dinyl)-1H-imidazol-5-yl)phenyl)-5-(2-((2S)-2-pyrroli-dinyl)-1H-imidazol-5-yl)pyrimidine

t_(R) = 1.63 min, (95%)LRMS: Anal.Calcd. forC₂₄H₂₆FN₈445.23;found:445.23 (M + H)⁺.HRMS: Anal.Calcd.forC₂₄H₂₆FN₈445.2264;found: 445.2268(M + H)⁺. D67methyl((1S)-2-((2S)-2-(5-(2-flouro-4-(5-(2-((2S)-1-(N-(methoxy-carbonyl)-L-alanyl)-2-pyrroli-dinyl)-1H-imida-zol-5-yl)-2-pyrimi-dinyl)phenyl)-1H-imida-zol-2-yl)-1-pyrrolidinyl)-1-methyl-2-oxoeth-yl)carbamate

t_(R) = 1.58 min, (91.1%)LRMS:Anal. Calcd. forC₃₄H₄₀FN₁₀O₆703.31;found:703.27 (M + H)⁺.HRMS:Anal. Calcd.forC₃₄H₄₀FN₁₀O₆703.3116;found: 703.3101(M + H)⁺. D68methyl((1S)-1-(((2S)-2-(5-(2-fluoro-4-(5-(2-((2S)-1-((2S)-2-((methoxy-carbonyl)a-mino)-3-methyl-butanoyl)-2-pyrroli-dinyl)-1H-imida-zol-5-yl)-2-pyrimi-dinyl)phenyl)-1H-imida-zol-2-yl)-1-pyrroli-dinyl)carbo-nyl)-2-methylpro-pyl)carbamate

t_(R) = 1.95 min, (99.3%)LRMS: Anal.Calcd. forC₃₈H₄₈FN₁₀O₆759.37;found:759.30(M + H)⁺.HRMS: Anal.Calcd. forC₃₈H₄₈FN₁₀O₆759.3742;found:759.3715(M + H)⁺. D69methyl((1R)-2-((2S)-2-(5-(2-(3-fluoro-4-(2-((2S)-1-((2R)-2-((methoxy-carbonyl)a-mino)-2-phenyl-acetyl)-2-pyrroli-dinyl)-1H-imidazol-5-yl)phenyl)-5-pyrimi-dinyl)-1H-imida-zol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenyl-eth-yl)carbamate

t_(R) = 2.05 min. (99.3%)LRMS: Anal.Calcd. forC₄₄H₄₄FN₁₀O₆ 827.34;found:827.27(M + H)⁺.HRMS: Anal.Calcd. forC₄₄H₄₄FN₁₀O₆827.3429;found:827.3407(M + H)⁺. D70methyl((1S,2R)-1-(((2S)-2-(5-(2-fluoro-4-(5-(2-((2S)-1-(N-(methoxy-carbonyl)-O-methyl-L-threonyl)-2-pyrroli-dinyl)-1H-imida-zol-5-yl)-2-pyrimidi-nyl)phenyl)-1H-imida-zol-2-yl)-1-pyrroli-dinyl)carbo-nyl)-2-methoxy-propyl)carba-mate

t_(R) = 1.79 min, (93.0%)LRMS: Anal.Calcd. forC₃₈H₄₈FN₁₀O₈ 791.36;found:791.31(M + H)⁺.HRMS: Anal.Calcd. forC₃₈H₄₈FN₁₀O₈791.3641;found:791.3636(M + H)⁺. **LCMS conditions: Phenomenex-Luna 4.6 × 50 mmS10, 0 to 100% B over 3 min, 4 min stop time, 4 mL/min, 220 nm, A: 10%MeOH-90%H2O-0.1% TFA; B: 90% MeOH-10% H2O-0.1% TFA

Example D5 (S)-tert-butyl2-(5-(4-bromo-2-fluorophenyl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylate

Bromine (0.54 mL, 10.6 mmol) was added dropwise to a cold (0° C.)solution of 4-bromo-2-fluoroacetophenone (2.30 g, 10.6 mmol) in dioxane(80 mL) and tetrahydrofuran (80 mL). The mixture was stirred for 1 h at0° C. and warmed to RT for 15 h. The mixture was diluted with ethylacetate, washed with saturated NaHCO₃ solution, 5% sodium thiosulfatesolution and brine prior to drying (Na₂SO₄).2-Bromo-1-(4-bromo-2-fluorophenyl)ethanone (DI) was isolated as acolorless film which solidified upon further concentration under highvacuum. This solid was dissolved into anhydrous acetonitrile (50 mL) andtreated with N-Boc-L-proline (2.28 g, 10.6 mmol) anddiisopropylethylamine (1.85 mL, 10.6 mmol). After being stirred for 3 hat RT, the solvent was removed in vacuo and the residue was partitionedinto ethyl acetate and water. The organic phase was washed with 0.1Nhydrochloric acid, saturated NaHCO₃ solution and brine prior to drying(Na₂SO₄), filtration, and concentration. This residue was taken up inxylenes (50 mL) and treated to solid NH₄OAc (4.1 g, 53.0 mmol). Themixture was heated at 140° C. for 2 hr in a thick-walled, screw-topflask before it was cooled to ambient temperature, diluted with ethylacetate and washed with saturated NaHCO₃ solution and brine prior todrying (Na₂SO₄) and concentration. Purification of the residue byBiotage™ flash chromatography on silica gel (65M column,preequilibration with 16% B for 1800 mL followed by gradient elutionwith 16% B to 16% B for 450 mL, 16% B to 50% B for 2199 ml and finally50% B to 100% B for 2199 mL) afforded title compound (D5) (3.61 g, 83%)as a brownish/caramel-colored oil. A small portion (40 mg) of the titlecompound was further purified by preparative HPLC (20% B to 100% B over14 min where B is 10 mM NH₄OAc in 10:90 H₂O/ACN and A is 10 mM NH₄OAc in95:5 H₂O/CAN using a Phenomenex-Gemini 30×100 mm S10 column flowing at40 mL/min) to afford pure title compound (31.8 mg) as a white solid.

¹H NMR (500 MHz, DMSO-d₆) δ 12.13-11.95 (m, 1H), 7.94 (br s, 1H), 7.54(d, J=10.7 Hz, 1H), 7.42 (d, J=7.9 Hz, 1H), 7.36-7.34 (m, 1H), 4.86-4.77(2m, 1H), 3.54 (m, 1H), 3.38-3.32 (m, 1H), 2.28-2.14 (2m, 1H), 2.05-1.78(2m, 3H), 1.39 and 1.14 (2s, 9H).

HPLC Phenomenex LUNA C-18 4.6×50 mm, 0 to 100% B over 3 minutes, 1minute hold time, A=90% water, 10% methanol, 0.1% TFA, B=10% water, 90%methanol, 0.1% TFA, RT=2.27 min, 95% homogeneity index.

LRMS: Anal. Calcd. for C₁₈H₂₂BrFN₃O₂ 410.09 and 412.09; found: 410.08and 412.08 (M+H)⁺.

HRMS: Anal. Calcd. for C₁₈H₂₂BrFN₃O₂ 410.0879; found: 410.0893 (M+H)⁺.

Section M: LC Conditions were as follows:

Condition 1

Column=Phenomenex-Luna 3.0×50 mm S10

Start % B=0

Final % B=100

Gradient time=2 min

Stop time=3 min

Flow Rate=4 mL/min

Wavelength=220 nm

Solvent A=0.1% TFA in 10% methanol/90% H₂O

Solvent B=0.1% TFA in 90% methanol/10% H₂O

Condition 2

Column=Phenomenex-Luna 4.6×50 mm S10

Start % B=0

Final % B=100

Gradient time=2 min

Stop time=3 min

Flow Rate=5 mL/min

Wavelength=220 nm

Solvent A=0.1% TFA in 10% methanol/90% H₂O

Solvent B=0.1% TFA in 90% methanol/10% H₂O

Condition 3

Column=HPLC XTERRA C18 3.0×50 mm S7

Start % B=0

Final % B=100

Gradient time=3 min

Stop time=4 min

Flow Rate=4 mL/min

Wavelength=220 nm

Solvent A=0.1% TFA in 10% methanol/90% H₂O

Solvent B=0.1% TFA in 90% methanol/10% H₂O

Condition M1

Column: Luna 4.6×50 mm S10

Start % B=0

Final % B=100

Gradient time=3 min

Stop time=4 min

Flow rate=4 mL/min

Solvent A: =95% H₂O: 5% CH₃CN, 10 mm Ammonium acetate

Solvent B: =5% H₂O: 95% CH₃CN; 10 mm Ammonium acetate

Example M1144,4′-bis(2-((2S)-1-(N-(methoxycarbonyl)-L-valyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-biphenylcarboxylicacid

Example M114 Step a

DMF (20 mL) was added to mixture of KHCO₃ (1.84 g, 18.4 mmol) and2-bromo-5-iodobenzoic acid (4.99 g, 15.3 mmol) and the resulting mixturewas stirred for 15 min. Benzyl bromide (2.4 mL, 20.2 mmol) was addeddrop-wise over 5 min and stirring was continued at ambient condition for˜20 hr. Most of the volatile component was removed in vacuo and theresidue was partitioned between CH₂Cl₂ (50 mL) and water (50 mL), andthe organic layer was washed with water (50 mL), dried (MgSO₄),filtered, and concentrated. The resulting crude material was purifiedwith flash chromatography (7% EtOAc/hexanes) to afford ester M114a as acolorless viscous oil (6.01 g). ¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz): δ8.07 (d, J=2.0, 1H), 7.81 (dd, J=8.4, 2.1, 1H), 7.53 (d, J=8.4, 1H),7.48 (m, 2H), 7.43-7.34 (m, 3H), 5.34 (s, 2H). LC (Cond. 1): RT=2.1 min;LC/MS: Anal. Calcd. for [M+Na]⁺ C₁₄H₁₀BrINaO₂: 438.88; found 438.83.

Example M114 Step b-d

Ester M114a was elaborated to ester M114d by employing a three stepprotocol employed in the synthesis of bromide 121c from1-bromo-4-iodo-2-methylbenzene. M114d: ¹H NMR (DMSO-d₆, δ=2.5 ppm, 400MHz): δ 12.04/11.97 (br s, 1H), 8.12 (d, J=2.0, 0.92H), 7.99 (app br s,0.08H), 7.81 (dd, J=8.3, 2.0, 0.92H), 7.74-7.62 (m, 2.08H), 7.50 (app brd, J=7.0, 2H), 7.44-7.35 (m, 3H), 5.38 (s, 2H), 4.79 (m, 1H), 3.52 (appbr s, 1H), 3.36 (m, 1H), 2.24-1.79 (m, 4H), 1.39/5.11 (two s, 9H). LC(Cond. 1): RT=1.66 min; LC/MS: Anal. Calcd. for [M+H]³⁰ C₂₆H₂₉BrN₃O₄:526.13; found 526.16.

Example M114 Step e

Ester M114e was prepared from bromide M114d and boronate 1c according tothe preparation of dimer 1d. ¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz): δ12.18/12.00/11.91/11.83 (four br s, 2H), 8.11-7.03 (m, 14H), 5.10 (s,2H), 4.85-4.78 (m, 2H), 3.55 (app br s, 2H), 3.37 (m, 2H), 2.29-1.80 (m,8H), 1.41/1.16 (two s, 18H). LC (Cond. 1): RT=1.54 min; LC/MS: Anal.Calcd. for [M+H]⁺ C₄₄H₅₁N₆O₆: 759.39; found 759.63.

Example M114 Step f

A mixture of benzyl ester M114e (1.005 g, 1.325 mmol) and 10% Pd/C (236mg) in MeOH (20 mL) was stirred under a balloon of H₂ for 5 hr. Thereaction mixture was then treated with a 1:1 mixture of MeOH and CH₂Cl₂,filtered through a pad of diatomaceous earth (Celite®-521), and thefiltrate was rotervaped to afford acid M114f (840 mg), contaminated withPh₃PO which was a carryover from the Suzuki coupling step. ¹H NMR(DMSO-d₆, δ=2.5 ppm, 400 MHz): δ 12.17/11.98/11.89/11.81 (four app br s,2H), 8.04-7.31 (m, 9H), 4.85-4.78 (m, 2H), 3.55 (app br s, 2H), ˜3.37(m, 2H, overlaped with water signal) 2.27-1.84 (m, 8H), 1.41/1.16 (twos, 18H). LC (Cond. 1): RT=1.37 min; LC/MS: Anal. Calcd. for [M+H]⁺C₃₇H₄₅N₆O₆: 669.34; found 669.53.

Example M114 Step g

4N HCl/dioxane (8.0 mL) and CH₂Cl₂ (2.0 mL) were sequentially added tocarbamate M114f (417 mg, 0.623 mmol), the mixture was vigorously stirred5.5 hr, and then the volatile component was removed in vacuo to affordthe HCl (0.4×) salt of pyrrolidine M114g (487 mg), contaminated withPh₃PO impurity. ¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz) after D₂O exchange:δ 8.23 (d, J=1.7, 1H), 8.09-8.04 (m, 3H), 7.92 (d, J=8.3, 2H), 7.53 (d,J=8.1, 1H), 7.48 (d, J=8.3, 2H), 5.00 (app br t, J=8.3, 1H), 4.90 (appbr t, J=8.4, 1H), 3.6-3.3 (m, 4H), 2.5-1.99 (m, 8H). LC (Cond. 1):RT=0.92 min; LC/MS: Anal. Calcd. for [M+H]⁺ C₂₇H₂₉N₆O₂: 469.24; found469.31.

Example M114

HATU (79.9 mg, 0.21 mmol) was added to a DMF (3.0 mL) solution ofpyrrolidine M114g.4HCl (80 mg, 0.13 mmol), Cap-51 (92.4 mg, 0.527 mmol)and i-Pr₂EtN (160 μL, 0.919 mmol), and the reaction mixture was stirredat ambient condition for 2 hr. The volatile component was removed invacuo and the residue was purified with a combination of MCX (MeOH wash;2.0 M NH₃/MeOH elution) and a reverse phase HPLC (CH₃CN/H₂O/NH₄OAc) toafford the acetic acid salt of Example M114. LC (Cond. 1): RT=1.20min; >98 homogeneity index. LC/MS: Anal. Calcd. for [M+H]⁺ C₄₁H₅₁N₈O₈:783.38; found 783.34. HRMS Calcd. for [M+H]⁺ C₄₁H₅₁N₈O₈: 783.3830; found783.3793.

Example M118methyl((1S)-]-(((2S)-2-(5-(2′-carbamoyl-4′-(2-((2S)-1-((2S)-2-((methoxycarbonyl)amino)-3-methylbutanoyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-4-biphenylyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)carbonyl)-2-methylpropyl)carbamate

Example M118 Step a

Et₃N (300 μL, 2.15 mmol) was added to a mixture of acid M114f (198.3 mg,0.297 mmol), HOBt (94.2 mg, 0.697 mmol), EDCI (0.66 mmol), NH₄Cl (101mg, 1.89 mmol) in DMF (8.0 mL) and stirred for 17 hr at ambientcondition. The reaction mixture was filtered through 0.45 μm filter, thevolatile component was removed in vacuo and the residue was partitionedbetween CH₂Cl₂ and water. The organic layer was concentrated and theresulting crude material was purified with a reverse phase HPLC(MeOH/H₂O/TFA).

The above product was treated with 25% TFA/CH₂Cl₂ (4.0 mL) and thereaction mixture was stirred for 2.5 hr at ambient condition. Thevolatile component was removed in vacuo and the residue was free-based(MCX; MeOH wash; 2.0 M NH₃/MeOH elution) to afford amide M118a (67.2mg). ¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz): δ 11.83 (br s, 2H), 7.81-7.80(m, 2H), 7.73 (d, J=8.3, 2H), 7.65 (br s, 1H), 7.52 (br S, 1H), 7.44 (brs, 1H), 7.41 (d, J=8.3, 2H), 7.36 (d, J=8.3, 1H), 7.31 (br s, 1H), 4.16(app t, J=7.2, 2H), 3.00-2.94 (m, 2H), 2.88-2.82 (m, 2H), 2.10-2.01 (m,2H), 1.94-1.85 (m, 2H), 1.83-1.66 (m, 4H). LC (Cond. 1): RT=0.89min; >95 homogeneity index. LC/MS: Anal. Calcd. for [M+H]⁺ C₂₇H₃₀N₇O:468.25; found 468.24.

Example M118

The TFA salt of Example M118 was prepared from intermediate M118a andCap-51 according to the procedure described for Example 1. LC (Cond. 1):RT=1.16 min; 97% homogeneity index. LC/MS: Anal. Calcd. for [M+H]⁺C₄₁H₅₂N₉O₇: 782.40; found 782.40. HRMS: Anal. Calcd. for [M+H]⁺C₄₁H₅₂N₉O₇: 782.3990; found 782.3979.

Example M119methyl((1S)-1-(((2S)-2-(5-(2-(hydroxymethyl)-4′-(2-((2S)-1-((2S)-2-((methoxycarbonyl)amino)-3-methylbutanoyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-4-biphenylyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)carbonyl)-2-methylpropyl)carbamate

Example M119 Step a

DIBAL-H (8.0 mL of 1.0 M/CH₂Cl₂, 8.0 mmol) was added drop-wise to anice-water cooled CH₂Cl₂ (20 mL) solution of benzyl ester M114e (1.216 g,1.60 mmol), and the reaction mixture was stirred for 1 hr and anadditional DIBAL-H (0.5 mL of 1.0 M/CH₂Cl₂, 0.5 mmol) was added andstirring was continued for 2.5 hr. The reaction was quenched with excesssaturated NH₄Cl solution and the mixture was diluted with water andextracted with CH₂Cl₂ (3×). The combined organic phase was dried(MgSO₄), filtered, and concentrated in vacuo. The resulting crudematerial was purified with a Biotage (100 g silica gel; 2-6% MeOH/EtOAc)to afford alcohol M119a as an off-white foam (610 mg). ¹H NMR (DMSO-d₆,δ=2.5 ppm, 400 MHz): δ 12.23 (brs, 0.19 H), 12.17 (brs, 0.19H), 11.89(brs, 0.81H), 11.82 (br s, 0.81H), 7.97 (s, 0.81H), 7.84 (s, 0.19H),7.78 (d, J=8.1, 1.62H), 7.69-7.20 (m, 6.38H), 5.21-5.15 (m, 1H),4.86-4.78 (m, 2H), 4.49-4.45 (m, 2H), -3.54 (m, 2H), 3.40-3.34 (m, 2H),2.30-1.80 (m, 8H), 1.41/1.17 (two s, 18H). LC (Cond. 1): RT=1.36 min.LC/MS: Anal. Calcd. for [M+H]⁺ C₃₇H₄₇N₆O₅: 655.36; found 655.34.

Example M119 Step b

25% TFA/CH₂Cl₂ (3.0 mL) was added to carbamate M119a (105 mg, 0.160mmol) and the mixture was stirred at ambient condition for 4.5 hr. Thevolatile component was removed in vacuo and the residue was free-based(MCX; MeOH wash; 2.0 M NH3/MeOH elution) to afford pyrrolidine M119b,contaminated with its trifluoroacetylated derivative of unknownregiochemistry. The sample was dissolved in MeOH (1.5 mL) and treatedwith 1.0 M NaOH/H₂O (300 μL, 0.3 mmol) and the mixture was stirred for2.75 hr. It was then directly submitted to MCX purification (MeOH wash;2.0 M NH₃/MeOH elution) to afford M119b as a film of white solid (63.8mg). ¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz): δ 11.82 (br s, 2H), 7.96 (s,1H), 7.77 (d, J=8.0, 2H), 7.66 (d, J=8.0, 1H), 7.46 (br s, 1H), 7.42 (brs, 1H), 7.36 (d, J=8.0, 2H), 7.21 (d, J=8.0, 1H), 5.16 (app br s, 1H),4.46 (s, 2H), 4.16 (app t, J=7.1, 2H), 3.00-2.82 (two m, 4H; there is abroad base line signal in this region from the pyrrolidine NH that wasnot included in the integration), 2.10-2.01 (m, 2H), 1.94-1.85 (m, 2H),1.83-1.67 (m, 4H). LC (Cond.1): RT =0.78 min. LC/MS: Anal. Calcd. for[M+H]⁺ C₂₇H₃₁N₆O: 455.26; found 455.27.

Example M119

Example M119 was prepared from M119b and Cap-51 according to theprocedure described for Example 1, with the exception that a reversephase HPLC with ACN/H₂O/NH₄OAC solvent system was employed for thepurification step. LC (Cond. 1): RT=1.15 min; 98% homogeneity index.LC/MS: Anal. Calcd. for [M+H]⁺ C₄₁H₅₃N₈O₇: 769.40; found 769.40. HRMS:Anal. Calcd. for [M+H]⁺ C₄₁H₅₃N₈O₇: 769.4037; found 769.4023.

Example M120methyl((1S)-1-(((2S)-2-(5-(2-((dimethylamino)methyl)-4′-(2-((2S)-1-((2S)-2-((methoxycarbonyl)amino)-3-methylbutanoyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-4-biphenylyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)carbonyl)-2-methylpropyl)carbamate

Example M120 Step a

CH₂Cl₂ (6.0 mL) was added to a mixture alcohol M119a (501 mg, 0.765mmol), TPAP (29.1, 0.083 mmol) and 4-methylmorpholine N-oxide (135.8 mg,1.159 mmol), and the resultant heterogeneous mixture was vigorouslystirred at ambient condition for 14.5 hr. Additional TPAP (11.0 mg,0.031 mmol) and 4-methylmorpholine N-oxide (39 mg, 0.33 mmol) were addedand stirring was continued for an additional 24 hr. The mixture wasfiltered through diatomaceous earth (Celite®), the filtrate wasrotervaped and the resulting crude material was purified with a Biotage(2% MeOH/EtOAc) to afford aldehyde M120a as a yellow viscous oil (195.6mg). LC (Cond. 1): RT=1.37 min. LC/MS: Anal. Calcd. for [M+H]⁺C₃₇H₄₅N₆O₅: 653.35; found 653.40.

Example M120 Step b

NaCNBH₃ (33 mg, 0.50 mmol) was added in one batch to a MeOH (3.0 mL)solution of aldehyde M120a (195.6 mg, 0.30 mmol) and Me₂NH (200 μL of40% solution in H₂O), and the reaction mixture was stirred for 4 hr. Thevolatile component was removed in vacuo and the residue was purifiedwith a flash chromatography (sample was loaded as a silica gel mesh;3-15% MeOH/CH₂Cl₂) to afford amine M120b as an off-white foam (120 mg).LC (Cond. 1): RT=1.32 min. LC/MS: Anal. Calcd. for [M+H]⁺ C₃₉H₅₂N₇O₄:682.41; found 682.42.

Example M120 Step c

Carbamate M120b was converted to M120c by employing the protocoldescribed for the preparation of 1e from 1d. ¹H NMR (DMSO-d₆, δ=2.5 ppm,400 MHz): δ 11.82 (br s, 2H), 7.87 (s, 1H), 7.77 (d, J=8.0, 2H), 7.65(d, J=7.8, 1H), 7.45/7.43 (overlapping two br s, 2H), 7.37 (d, J=7.8,2H), 7.21 (d, J=7.8, 1H), 4.87 (m, 0.1H), 4.17 (m, 1.90H), ˜3.3 (signalof Me₂NCH₂ overlapped with that of water), 3.01-2.94 (m, 2H), 2.89-2.83(m, 2H), 2.10 (s, 6H), 2.10-2.01 (m, 2H), 1.94-1.85 (m, 2H), 1.81-1.67(m, 4H). LC (Cond. 1): RT=0.79 min. LC/MS: Anal. Calcd. for [M+H]⁺C₂₉H₃₆N₇: 482.30; found 482.35.

Example M120

The TFA salt of Example M120 was prepared from pyrrolidine M120c andCap-51 according to the procedure described for Example 1. LC (Cond. 1):RT=1.06 min; 96% homogeneity index. LC/MS: Anal. Calcd. for [M+H]⁺C₄₃H₅₈N₉O₆: 796.45; found 796.48. HRMS: Anal. Calcd. for [M+H]⁺C₄₃H₅₈N₉O₆: 796.4510; found 796.4515.

Example M121dimethyl((2-((dimethylamino)methyl)-4,4′-biphenyldiyl)bis(1H-imidazole-5,2-diyl(2S)-2,1-pyrrolidinediyl((1R)-2-oxo-1-phenyl-2,1-ethanediyl)))biscarbamate

The TFA salt of Example M121 was prepared from M120c and Cap-4 accordingto the procedure described for Example 1. LC (Cond. 1): RT=1.15min; >98% homogeneity index. LC/MS: Anal. Calcd. for [M+H]⁺ C₄₉H₅₄N₉O₆:796.45; found 864.46. HRMS: Anal. Calcd. for [M+H]⁺ C₄₉H₅₄N₉O₆:864.4197; found 864.4222.

Example M122methyl((1S)-1-(((1S,3S,5S)-3-(5-(4′-(2-((1S,3S,5S)-2-((2S)-2-((methoxycarbonyl)amino)-3-methylbutanoyl)-2-azabicyclo[3.1.0]hex-3-yl)-1H-imidazol-5-yl)-4-biphenylyl)-1H-imidazol-2-yl)-2-azabicyclo[3.1.0]hex-2-yl)carbonyl)-2-methylpropyl)carbamate

Example M122 Step a

Diisopropyl ethylamine (1.81 mL, 10.4 mmol) was slowly added toacetonitrile (20 mL) solution of(1S,3S,5S)-2-(tert-butoxycarbonyl)-2-azabicyclo[3.1.0]hexane-3-carboxylicacid (2.36 g, 10.4 mmol) and(2-(4′-(2-bromoacetyl)biphenyl-4-yl)-2-oxoethyl)bromonium (2.0 g, 5.05mmol), and the reaction mixture was stirred at ambient conditions for 16hr. The solvent was evaporated and the residue was partitioned betweenethyl acetate and water (1:1, 40 mL each). The organic layer was washedwith Sat. NaHCO₃ (2×10 mL), brine, dried (Na₂SO₄), filtered, andconcentrated in vacuo to afford ketoester M122a (3.58 g) as a viscousamber oil, which solidified upon storage in a refrigerator. ¹H NMR(DMSO-d₆, δ=2.5 ppm, 400 MHz): δ 8.20 (m, 4H), 7.97 (d, J=8.5, 4H),5.71-5.48 (m, 4H), 4.69 (m, 2H), 3.44 (m, 2H), 3.3 (m, 2H), 2.76-2.67(m, 2 H), 2.27 (m, 2H), 1.60 (m, 2H), 1.44/1.38 (two s, 18H), 0.78 (m,2H), 0.70 (m, 2H). LC (Cond. 1): RT=1.70 min; LC/MS: the molecular ionwas not picked up.

Example M122 Step b

Ammonium acetate (2.89 g, 37.5 mmol) was added to a toluene (20 mL)solution of ketoester M122a (2.58 g, 3.75 mmol), and the resultingmixture was heated at 120° C. for 4.5 hr, while azaetroping the waterthat is formed with a Dean-Stark set-up. The reaction mixture was cooledto room temperature and the volatile component was removed in vacuo.Sat. NaHCO₃ solution (10 mL) was added to the solid and the mixture wasstirred for 30 min, and the solid was filtered, dried in vacuo andsubmitted to a Biotage purification (28-100% EtOAc/hexanes) to affordimidazole M122b as light yellow solid (0.6 g). LC (Cond. 1): RT=1.52min; LC/MS: Anal. Calcd. for [M+H]⁺ C₃₈H₄₅N₆O₄: 649.35; found 649.78.

Example M122 Step c

4 N HCl in dioxane (5 mL) was added to a ice-water cooled dioxane (16mL) solution of carbamate M122b (0.8 g, 1.2 mmol), the ice-water bathwas removed and the mixture was stirred at ambient condition for 4 hr.Big chunks of solid that formed during the reaction were broken up witha spatula. Removal of the volatile component in vacuo affordedpyrrolidine M122c (0.4 HCl) as yellow solid (0.73 g).

¹H NMR (DMSO-d₆, δ=2.5 ppm, 400 MHz): δ 7.90 (d, J=8.3, 4H), 7.84 (br s,2H), 7.79 (d, J=8.3, 4H), 5.24 (m, 2H), 3.38 (m, 2H), 2.71 (m, 2H),-2.50 (2H, overlapped with solvent signal), 1.93 (m, 2H), 1.38 (m, 2H),0.96 (m, 2H). LC (Cond. 1): RT=1.03 min; LC/MS: Anal. Calcd. for [M+H]⁺C₂₈H₂₉N₆: 449.25; found 449.59.

Example M122

The TFA salt of Example M122 was prepared from M122c and Cap-51according to the procedure described for Example 1. LC (Cond. 1):RT=1.34 min; LCAMS: Anal. Calcd. for [M+H]⁺ C₄₂H₅₁N₈O₆: 763.39; found763.73.

Biological Activity

An HCV Replion assay was utilized in the present disclosure, and wasprepared, conducted and validated as described in commonly ownedPCT/US2006/022197 and in O'Boyle et. al. Antimicrob Agents Chemother.April 2005;49(4): 1346-53.

HCV 1b-377-neo replicon cells were used to test the currently describedcompound series as well as cells resistant to compound A due to a Y2065Hmutation in NS5A (described in application PCT/US2006/022197). Thecompounds tested were determined to have more than 10-fold lessinhibitory activity on cells resistant to compound A than wild-typecells indicating a related mechanism of action between the two compoundseries. Thus, the compounds of the present disclosure can be effectiveto inhibit the function of the HCV NS5A protein and are understood to beas effective in combinations as previously described in applicationPCT/US2006/022197 and commonly owned WO/04014852. Further, the compoundsof the present disclosure can be effective against the HCV 1b genotype.It should also be understood that the compounds of the presentdisclosure can inhibit multiple genotypes of HCV. Table 2 shows the EC50values of representative compounds of the present disclosure against theHCV 1b genotype. In one embodiment compounds of the present disclosureare active against the 1a, 1b, 2a, 2b, 3a, 4a, and 5a genotypes. EC50ranges against HCV 1b are as follows: A=1-10 μM; B=100-999 nM; C=1-99nM; and D=10-999 pM.

The compounds of the present disclosure may inhibit HCV by mechanisms inaddition to or other than NS5A inhibition. In one embodiment thecompounds of the present disclosure inhibit HCV replicon and in anotherembodiment the compounds of the present disclosure inhibit NS5A.

TABLE 2 Example Range 1 D 24-4e C 24-4f B 24-4g A 25-1 D 25-2 D 25-3 D25-4 D 25-5 D 25-6 C 25-7 C 25-8 D 24-4h D 120-9 D 120 D 120-5 C 120-6 C120-7 D 120-8 C 103-3 D 103-4 D 103-1 D 103-2 D 103-5 D 103-6 C 103-8 D103-7 D 151 isomer 1 C 151 isomer 2 B 152j-9 C 152j-10 C 152j-1 C 152j-2D 153c-5 C 153c-6 C 153c-2 C 153c-1 C 152j-7 C 152j-8 D 153c-3 A 153c-4A 152j-11 D 152j-12 D 152j-15 D 152j-28 D 152j-13 C 152j-14 C 152j-19 D152j-16 D 152j-3 D 152j-20 C 152j-17 D 152j-18 D 152j-3 D 152j-5 D152j-6 D 152l-2 D 152l-1 D 152j-24 D 152j-23 D 153c-7 C 152j-22 D24-18-2 D 24-18-1 D 24-18-4 D 24-18-5 D 24-18-6 D 24-18-3 D 152j-21 D152l-3 D 131.1-2 D 131.1-1 D 24-4a D 120-1 D 120-2 D 120-3 D 120-4 D24-10 D 24-9 D 24-8 D 24-11 C 24-12 C 11 C 24-16 D 24-18 D 24-17 D 24-15C 24-13 B 24-14 C 24-4b C 24-4c D 24-4d D 148 C 149 D 150 C 24-5 D 24-6D 24-7 D 24-1 D 24-2 D 24-3 D 28-1 D 28-2 D 28-3 D 28-4 D 28-5 D 84-1 D84-2 D 84-3 D 84-4 D 84-7 C 84-10 C 84-12 D 84-14 C 84-15 C 84-17 D84-18 C 84-19 C 84-20 C 84-24 D 84-26 D 84-27 D 84-28 D 84-32 D 84-33 D84-34 C 84-35 D 84-36 D 84-38 D 84-39 D 84-40 D 84-44 D 84-46 D 84-47 D84-48 D 84-49 D 84-50 D 84-51 D 84-52 D 84-53 D 84-54 D 84-55 D 84-56 D84-57 D 84-58 D 84-59 D 84-60 D 84-61 D 84-62 D 84-63 D 84-64 D 84-65C-D 84-66 C-D 84-67 D 84-68 C 84-69 D 84-70 C 84-71 C 84-72 C 84-73 C84-74 D 84-75 C 84-76 D 84-77 D 84-78 D 84-79 D 84-80 D 84-81 D 84-82 D84-83 D 84-84 D 84-85 D 84-86 D 84-87 D 94-1 D 94-2 C 94-3 D 94-6 C-D94-9 D 94-10 D 94-12 C 94-13 D 94-17 D 94-19 D 94-20 C 94-24 D 94-25 D94-26 D 94-27 C 94-30 D 94-32 C 94-33 C 94-34 C 94-36 D 94-37 C 94-38 D94-42 D 94-44 D 94-45 D 94-46 D 94-47 D 94-48 D 94-49 D 94-50 D 94-51 D94-52 D 94-53 D 94-54 D 94-55 D 94-56 D 107-1 D 107-2 D 107-3 D 107-4 D107-5 D 107-6 D 107-7 D 107-8 D 107-9 D 107-10 D 107-11 D 107-12 D107-13 D 107-14 D 107-15 D 107-16 D 107-17 D 107-18 D 107-19 D 107-20 D107-21 D 107-22 D 107-23 D 107-24 D 107-25 D 107-26 D 107-27 D 107-28 D107-29 D 107-30 D 107-31 D 107-32 D 107-33 D 107-34 D 107-35 D 107-36 D107-37 D 107-38 D 107-39 D 107-40 D 107-41 D 107-42 D 107-43 D 107-44 D2 D 3 D 4 D 5 C 6 C 7 D 8 D 24-23 D 9 C 10 C 11 C 12 C 13 C 14 B 15 C 16C 17 D 18 D 19 D 20 C 21 D 22 D 23 D 24 C 25 D 26 C 27 C 28 C 29 D 30 C31 D 32 C 33 D 34 D 35 D 36 D 37 D 38 D 39 D 40 D 41 D 42 D 43 D 44 D 45D 46 D 47 D 48 D 49 D 50 B 51 D 52 D 53 D 54 D 55 D 56 D 57 D 58 D 59 D60 D 61 D 62 D 63 D 64 D 65 C 67 D 68 D 69 D 70 C 71 D 72 C 73 D 74 D 75D 76 D 77 D 78 D 79 D 80 D 81 D 82 D 83 D 84 D 85 D 86 D 87 D 88 D 89 D90 D 91 D 92 D 93 D 94 D 95 D 96 D 97 D 98 D 99 D 100 D 101 D 102 D 103D 104 D 105 D 106 D 107 D 108 D 109 C 110 D 111 D 112 D 113 D 114 D 115D 116 D 117 D 118 D 119 D 120 D 121 D 122 D 123 D 124 D 125 D 126 D 127D 128 D 129 D 130 D 131 D 132 D 133 C 134 D 135 D 136 D 138 D 139 D 140D 141 D 142 C 143 D 144 D 145 D 146 D 147 D LS2 C LS3 C LS4 C LS16 C LS6B LS11 A LS14 D LS20 D LS21 D LS22 D LS23 D LS24 D LS25 D LS26 D LS27D'mer 1 D LS27 D'mer 2 D LS36 D LS37 D F5 D F6 D F7 D F8 D F14 D F15 DF16 D F17 D F20 B F21 B F22 B F25 D F26 C F27 C F28 C F29 C F30 C F32 BF33 B F34 C F35 B F37 B F38 D F39 D Diastereomers F41 D F43 D F48 D F49C F51 D F52 D F53 D F54 D F55 D F56 D F57 D F58 D F60 D F61 C F62 C F63D F64 C F65 B F66 C F67 C F69 B F70 B F71 D cj-48 B cj-49 C cj-50 Dcj-51 D cj-52 D cj-53 D cj-54 D cj-55 D cj-56 D cj-57 D cj-58 D cj-59 Dcj-60 D cj-61 D cj-62 D cj-63 D cj-64 D cj-65 D cj-66 D cj-67 D cj-68 Dcj-69 D cj-70 D cj-71 D cj-72 D cj-73 D cj-74 C cj-75 D cj-76 D cj-77 Dcj-78 D cj-79 D cj-80 D cj-81 D cj-82 D cj-83 D cj-84 D cj-85 D cj-86 Dcj-87 D cj-88 D cj-89 D cj-90 D cj-91 D cj-92 C cj-93 D cj-94 D cj-95 Dcj-96 D cj-97 D cj-98 D cj-99 D cj-100 D cj-101 D cj-102 D cj-103 Dcj-104 D cj-105 D cj-106 D cj-107 D cj-108 D cj-109 D cj-110 D cj-111 Dcj-112 D cj-113 D cj-114 D cj-115 D cj-116 D cj-117 D cj-118 D cj-119 Dcj-120 D cj-121 D cj-122 D cj-45 D cj-41 D cj-47 C cj-43 D cj-44 D cj-40D cj-46 D cj-42 D cj-36 D cj-37 D cj-38 D cj-39 D cj-32 D cj-33 D cj-34D cj-35 C cj-136 D cj-137 C cj-138 A cj-139 C cj-140 B cj-141 A cj-142 Acj-143 A cj-144 D cj-145 C cj-146 B cj-147 C cj-148 C cj-149 C cj-150 Ccj-151 C cj-152 C cj-153 D cj-154 D cj-155 C cj-156 D cj-126 D cj-127 Ccj-128 D cj-129 D cj-130 D cj-131 C cj-132 B cj-133 C cj-134 C cj-135 Ccj-125 C cj-15c D cj-20c D cj-20b D cj-20a D cj-17 D cj-16 D cj-20d Dcj-20 D cj-15a D cj-15 D cj-15d D cj-11n C cj-11o C cj-11p D cj-11m Ccj-11h D cj-11i D cj-11j D cj-11k D cj-11e A cj-11f C cj-11g C cj-11d Dcj-11b D cj-11 D cj-11a D cj-11c D JG-3 D JG-4 C JG-5 D JG-6 C JG-7 DJG-8 D JG-9 D JG-10 C JG-12 D JG-13 C JG-14 D JG-15 D JG-16 D JG-17 DOL-1 D OL-2 D OL-3 C OL-4 D OL-5 D OL-6 D OL-7 D OL-8 D OL-9 D OL-10 DOL-11 D OL-12 D OL-13 D OL-19 D OL-20 C OL-21 D D73 D D74 D D75 D D76 DD77 D J16 D J17 D J18 D J19 D J20 D J21 D J22 D J23 D J24 D J25 D J26 DJ27 D J28 C J29 D J30 C J31 D J37 D J38 D J39 D J40 D J41 D J42 D J42.aD J45 D J46 D J47 D J48 D J49 D J50 D J51 C D33 D D34 D D35 D D36 D D37D D38 D D39 D D40 D D41 D D42 D D43 D D44 D D45 D D46 D D47 D D48 D D49D D50 D D51 D D52 D D53 D D54 D D55 D D56 D D57 D D58 D D59 D D60 D D61D D62 D D63 D D64 D D65 D D66 D D67 D D68 D D69 D D70 D M1 >A M2 C M3 CM4 B M5 A M6 A M7 >A M8 A M9 B M10 >A M11 C M12 C M13 B M14 B M15 B M16A M17 B M18 A M19 >A M21 C M22 A M23 C M24 C M25 C M26 B M27 C M28 AM28-2 B M29 >A M30 C M31 C M32 B M33 C M34 C M35 C M36 C M37 C M38 C M39C M40 C M41 C M42 C M43 C M44 B M45 C M46 C M47 C M48 C M49 C M50 C M51C M52 C M53 C M54 C M55 C M56 C M57 C M58 C M59 C M60 C M61 C M62 C M63C M64 C M65 C M66a B M66b B M66x C M67a B M67b B M68 B M69 B M70 C M71 CM72 C M73 B M74 C M75 C M76 C M77 C M78 C M79 C M80 C M81 B M82 C M83 CM84 C M85 C M86 C M87 C M88 C M89 C M90 A M91 C M91x C M91y B M92 A M93C M94 C M95 C M96 B M97 C M98 C M99 C M100 C M101 B M102 C M103 B M104 BM105 C M106 C M107 C M108 C M109 C M110 C M111 A M112 C M113 C M114 >AM115 >A M116 >A M117 >A M118 >A M119 B M120 B M121 B M122 C M123 A M124C M125 C M126 C M127 C M128 C M129 A M130 C

It will be evident to one skilled in the art that the present disclosureis not limited to the foregoing illustrative examples, and that it canbe embodied in other specific forms without departing from the essentialattributes thereof. It is therefore desired that the examples beconsidered in all respects as illustrative and not restrictive,reference being made to the appended claims, rather than to theforegoing examples, and all changes which come within the meaning andrange of equivalency of the claims are therefore intended to be embracedtherein.

The compounds of the present disclosure may inhibit HCV by mechanisms inaddition to or other than NS5A inhibition. In one embodiment thecompounds of the present disclosure inhibit HCV replicon and in anotherembodiment the compounds of the present disclosure inhibit NS5A.Compounds of the present disclosure may inhibit multiple genotypes ofHCV.

1. A compound of Formula (I)

or a pharmaceutically acceptable salt thereof, wherein m and n areindependently 0, 1, or 2; q and s are independently 0, 1, 2, 3, or 4; uand v are independently 0, 1, 2, or 3; A and B are selected from phenyland a six-membered heteroaromatic ring containing one, two, or threenitrogen atoms; provided that at least one of A and B is other thanphenyl; X is selected from O, S, S(O), SO₂, CH₂, CHR⁵, and C(R⁵)₂;provided that when n is O, X is selected from CH₂, CHR⁵, and C(R⁵)₂; Yis selected from O, S, S(O), SO₂, CH₂, CHR⁶, and C(R⁶)₂; provided thatwhen m is O, Y is selected from CH₂, CHR⁶, and C(R⁶)₂; each R¹ and R² isindependently selected from alkoxy, alkoxyalkyl, alkoxycarbonyl, alkyl,arylalkoxycarbonyl, carboxy, formyl, halo, haloalkyl, hydroxy,hydroxyalkyl, —NR^(a)R^(b), (NR^(a)R^(b))alkyl, and(NR^(a)R^(b))carbonyl; R³ and R⁴ are each independently selected fromhydrogen, R⁹—C(O)—, and R⁹—C(S)—; each R⁵ and R⁶ is independentlyselected from alkoxy, alkyl, aryl, halo, haloalkyl, hydroxy, and—NR^(a)R^(b), wherein the alkyl can optionally form a fused three- tosix-membered ring with an adjacent carbon atom, wherein the three- tosix-membered ring is optionally substituted with one or two alkylgroups; R⁷ and R⁸ are each independently selected from hydrogen,alkoxycarbonyl, alkyl, arylalkoxycarbonyl, carboxy, haloalkyl,(NR^(a)R^(b))carbonyl, and trialkylsilylalkoxyalkyl; and each R⁹ isindependently selected from alkoxy, alkoxyalkyl, alkoxycarbonyl,alkoxycarbonylalkyl, alkyl, alkylcarbonylalkyl, aryl, arylalkenyl,arylalkoxy, arylalkyl, aryloxyalkyl, cycloalkyl, (cycloalkyl)alkenyl,(cycloalkyl)alkyl, cycloalkyloxyalkyl, haloalkyl, heterocyclyl,heterocyclylalkenyl, heterocyclylalkoxy, heterocyclylalkyl,heterocyclyloxyalkyl, hydroxyalkyl, —NR^(c)R^(d), (NR^(c)R^(d))alkenyl,(NR^(c)R^(d))alkyl, and (NR^(c)R^(d))carbonyl.
 2. A compound of claim 1,or a pharmaceutically acceptable salt thereof, wherein m and n areeach
 1. 3. A compound of claim 1, or a pharmaceutically acceptable saltthereof, wherein u and v are each independently 0 or 1; and each R¹ andR² is independently selected from alkyl and halo.
 4. A compound of claim1, or a pharmaceutically acceptable salt thereof, wherein u and v areeach independently 0 or 1; and when present, R¹ and/or R² are halo.
 5. Acompound of claim 4, or a pharmaceutically acceptable salt thereof,wherein the halo is fluoro.
 6. A compound of claim 1, or apharmaceutically acceptable salt thereof, wherein X is selected fromCH₂, CHR⁵, and C(R⁵)₂; and Y is selected from CH₂, CHR⁶, and C(R⁶)₂. 7.A compound of claim 1, or a pharmaceutically acceptable salt thereof,wherein R⁷ and R⁸ are independently selected from hydrogen, haloalkyl,and trialkylsilylalkoxyalkyl.
 8. A compound of claim 7, or apharmaceutically acceptable salt thereof, wherein R⁷ and R⁸ are eachhydrogen.
 9. A compound of claim 1, or a pharmaceutically acceptablesalt thereof, wherein q and s are independently 0, 1, or 2; and whenpresent, R⁵ and/or R⁶ are halo.
 10. A compound of claim 9, or apharmaceutically acceptable salt thereof, wherein each halo is fluoro.11. A compound of claim 1, or a pharmaceutically acceptable saltthereof, wherein at least one of R³ and R⁴ is hydrogen.
 12. A compoundof claim 1, or a pharmaceutically acceptable salt thereof, wherein R³and R⁴ are each R⁹—C(O)—.
 13. A compound of claim 12, or apharmaceutically acceptable salt thereof, wherein each R⁹ isindependently selected from alkoxy, alkoxyalkyl, alkyl,alkylcarbonylalkyl, aryl, arylalkenyl, arylalkoxy, arylalkyl,aryloxyalkyl, cycloalkyl, (cycloalkyl)alkyl, cycloalkyloxyalkyl,heterocyclyl, heterocyclylalkyl, hydroxyalkyl, —NR^(c)R^(d),(R^(c)R^(d))alkenyl, (R^(c)R^(d))alkyl, and (NR^(c)R^(d))carbonyl.
 14. Acompound of claim 13, or a pharmaceutically acceptable salt thereof,wherein each R⁹ is independently selected from alkoxy, arylalkyl,(cycloalkyl)alkyl, heterocyclyl, heterocyclylalkyl, and(NR^(c)R^(d))alkyl.
 15. A compound of Formula (II)

or a pharmaceutically acceptable salt thereof, wherein q and s areindependently 0, 1, or 2; u and v are independently 0 or 1; X isselected from CH₂, CHR⁵, and C(R⁵)₂; Y is selected from CH₂, CHR⁶, andC(R⁶)₂; when present, R¹ and/or R² are halo, wherein each halo isfluoro; R³ and R⁴ are each R⁹—C(O)—; when present, R⁵ and/or R⁶ arehalo, wherein each halo is fluoro; and each R⁹ is independently selectedfrom alkoxy, alkoxyalkyl, alkoxycarbonyl, alkoxycarbonylalkyl, alkyl,alkylcarbonylalkyl, aryl, arylalkenyl, arylalkoxy, arylalkyl,aryloxyalkyl, cycloalkyl, (cycloalkyl)alkenyl, (cycloalkyl)alkyl,cycloalkyloxyalkyl, haloalkyl, heterocyclyl, heterocyclylalkenyl,heterocyclylalkoxy, heterocyclylalkyl, heterocyclyloxyalkyl,hydroxyalkyl, —NR^(c)R^(d), (NR^(c)R^(d))alkenyl, (NR^(c)R^(d))alkyl,and (NR^(c)R^(d))carbonyl.
 16. A compound of Formula (III)

or a pharmaceutically acceptable salt thereof, wherein u and v areindependently 0 or 1; A and B are selected from phenyl and asix-membered heteroaromatic ring containing one or two nitrogen atoms;provided that at least one of A and B is other than phenyl; each R¹ andR² is independently selected from alkyl and halo; R³ and R⁴ are eachindependently selected from hydrogen and R⁹—C(O)—; R⁷ and R⁸ are eachindependently selected from hydrogen, haloalkyl, andtrialkylsilylalkoxyalkyl; and each R⁹ is independently selected fromalkoxy, arylalkyl, (cycloalkyl)alkyl, heterocyclyl, heterocyclylalkyl,and (NR^(c)R^(d))alkyl.
 17. A compound selected from(1R)-2-((2S)-2-(5-(6-(4-(2-((2S)-1-((2R)-2-(dimethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-3-pyridinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-N,N-dimethyl-2-oxo-1-phenylethanamine;(1R)-2-((2S)-2-(5-(6-(4-(2-((2S)-1-((2R)-2-hydroxy-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-3-pyridinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethanol;methyl((1R)-2-((2S)-2-(5-(6-(4-(2-((2S)-1-((2R)-2-((methoxycarbonyl)amino-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-3-pyridinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate;5-(2-((2S)-1-((2R)-2-methoxy-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-(4-(2-((2S)-1-((2R)-2-methoxy-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)pyridine;(1R)-2-((2S)-2-(5-(6-(4-(2-((2S)-1-((2R)-2-(dimethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-methylphenyl)-3-pyridinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-N,N-dimethyl-2-oxo-1-phenylethanamine;methyl((1R)-2-((2S)-2-(5-(6-(4-(2-((2S)-1-((2R)-2-((methoxycarbonyl)amino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-methylphenyl)-3-pyridinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate;N-((1R)-2-((2S)-2-(5-(6-(4-(2-((2S)-1-((2R)-2-acetamido-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-3-pyridinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)acetamide;methyl((1R)-2-((2S)-2-(5-(4-(5-(2-((2S)-1-((2R)-2-(dimethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyridinyl)phenyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate;methyl((1R)-2-oxo-1-phenyl-2-((2S)-2-(5-(4-(5-(2-((2S)-1-((2R)-tetrahydro-2-furanylcarbonyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyridinyl)phenyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)ethyl)carbamate;methyl((1R)-2-((2S)-2-(5-(4-(5-(2-((2S)-1-((1-methyl-4-piperidinyl)carbonyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyridinyl)phenyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate;methyl((1R)-2-oxo-1-phenyl-2-((2S)-2-(5-(4-(5-(2-((2S)-1-(3-pyridinylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyridinyl)phenyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)ethyl)carbamate;methyl((1R)-2-((2S)-2-(5-(4-(5-(2-((2S)-1-(4-morpholinylcarbonyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyridinyl)phenyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate;dimethyl(2,2′-bipyridine-5,5′-diylbis(1H-imidazole-5,2-diyl(2S)-2,1-pyrrolidinediyl((1R)-2-oxo-1-phenyl-2,1-ethanediyl)))biscarbamate;(1R)-2-((2S)-2-(5-(5-(4-(2-((2S)-1-((2R)-2-(dimethylamino)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-2-pyridinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-N,N-dimethyl-2-oxo-1-phenylethanamine;methyl((1R)-2-((2S)-2-(5-(5-(4-(2-((2S)-1-((2R)-2-((methoxycarbonyl)amino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-2-pyridinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate;(S)-2-[5-(2-{4-[2-((S)-1-tert-Butoxycarbonyl-pyrrolidin-2-yl)-3H-imidazol-4-yl]-phenyl}-pyrimidin-5-yl)-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylicacid tert-butyl ester;5-((S)-2-Pyrrolidin-2-yl-3H-imidazol-4-yl)-2-[4-((S)-2-pyrrolidin-2-yl-3H-imidazol-4-yl)-phenyl]-pyrimidine;(S)-2-(5-{2-[4-((S)-2-Pyrrolidin-2-yl-3H-imidazol-4-yl)-phenyl]-pyrimidin-5-yl}-1H-imidazol-2-yl)-pyrrolidine-1-carboxylicacid tert-butyl ester;(1R)-2-((2S)-2-(5-(2-(4-(2-((2S)-1-((2R)-2-(dimethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-5-pyrimidinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-N,N-dimethyl-2-oxo-1-phenylethanamine;methyl((1R)-2-((2S)-2-(5-(2-(4-(2-((2S)-1-((2R)-2-((methoxycarbonyl)amino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-5-pyrimidinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate;methyl((1R)-2-oxo-1-phenyl-2-((2S)-2-(5-(4-(5-(2-((2S)-1-(3-pyridinylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyrimidinyl)phenyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)ethyl)carbamate;methyl((1R)-2-oxo-1-phenyl-2-((2S)-2-(5-(2-(4-(2-((2S)-1-(3-pyridinylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-5-pyrimidinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)ethyl)carbamate;5-(2-((2S)-1-((2R)-2-phenyl-2-(1-piperidinyl)acetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-(4-(2-((2S)-1-((2R)-2-phenyl-2-(1-piperidinyl)acetyl)-2-pyrrolidinyl)-1H-imidazol-4-yl)phenyl)pyrimidine;(1R)-2-((2S)-2-(5-(5-(4-(2-((2S)-1-((2R)-2-(dimethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-2-pyrazinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-N,N-dimethyl-2-oxo-1-phenylethanamine;methyl((1R)-2-((2S)-2-(5-(5-(4-(2-((2S)-1-((2R)-2-((methoxycarbonyl)amino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-2-pyrazinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate;(1R)-2-((2S)-2-(5-(6-(4-(2-((2S)-1-((2R)-2-(dimethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-3-pyridazinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-N,N-dimethyl-2-oxo-1-phenylethanamine;methyl((1R)-2-((2S)-2-(5-(6-(4-(2-((2S)-1-((2R)-2-((methoxycarbonyl)amino-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-3-pyridazinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate;{(R)-2-Oxo-1-phenyl-2-[(S)-2-(5-{4-[5-((S)-2-pyrrolidin-2-yl-3H-imidazol-4-yl)-pyrimidin-2-yl]-phenyl}-1H-imidazol-2-yl)-pyrrolidin-1-yl]-ethyl}-carbamicacid methyl ester;methyl((1R)-2-oxo-1-phenyl-2-((2S)-2-(4-(4-(5-(2-((2S)-1-((2R)-2-phenyl-2-(1-piperidinyl)acetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyrimidinyl)phenyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)ethyl)carbamate;(S)-2-[5-{5′-[2-((S)-1-tert-Butoxycarbonyl-pyrrolidin-2-yl)-3-(2-trimethylsilanyl-ethoxymethyl)-3H-imidazol-4-yl]-[2,2′]bipyrimidinyl-5-yl}-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylicacid tert-butyl ester;(1R,1′R)-2,2′-(3,3′-bipyridazine-6,6′-diylbis(1H-imidazole-5,2-diyl(2S)-2,1-pyrrolidinediyl))bis(N,N-dimethyl-2-oxo-1-phenylethanamine);dimethyl(3,3′-bipyridazine-6,6′-diylbis(1H-imidazole-5,2-diyl(2S)-2,1-pyrrolidinediyl((1R)-2-oxo-1-phenyl-2,1-ethanediyl)))biscarbamate;(1R,1′R)-2,2′-(2,2′-bipyrimidine-5,5′-diylbis(1H-imidazole-5,2-diyl(2S)-2,1-pyrrolidinediyl))bis(N,N-dimethyl-2-oxo-1-phenylethanamine);dimethyl(2,2′-bipyrimidine-5,5′-diylbis(1H-imidazole-5,2-diyl(2S)-2,1-pyrrolidinediyl((1R)-2-oxo-1-phenyl-2,1-ethanediyl)))biscarbamate;(1R,1′R)-2,2′-(2,2′-bipyrazine-5,5′-diylbis(1H-imidazole-5,2-diyl(2S)-2,1-pyrrolidinediyl))bis(N,N-dimethyl-2-oxo-1-phenylethanamine);dimethyl(2,2′-bipyrazine-5,5′-diylbis(1H-imidazole-5,2-diyl(2S)-2,1-pyrrolidinediyl((1R)-2-oxo-1-phenyl-2,1-ethanediyl)))biscarbamate;tert-butyl(2S)-2-(5-(2-(4-(2-((2S)-1-((2R)-2-(diethylamino)-2-phenylacetyl)-3-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-5-pyrimidinyl)-1H-imidazol-2-yl)-1-pyrrolidinecarboxylate;(1R)-N,N-diethyl-2-oxo-1-phenyl-2-((2S)-2-(5-(4-(5-(2-((2S)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyrimidinyl)phenyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)ethanamine;methyl((1S)-2-((2S)-2-(5-(4-(5-(2-((2S)-1-(N-(methoxycarbonyl)-L-alanyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyrimidinyl)phenyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-1-methyl-2-oxoethyl)carbamate;methyl((1S)-1-(((2S)-2-(5-(2-(4-(2-((2S)-1-((2S)-2-((methoxycarbonyl)amino)-3-methylbutanoyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-5-pyrimidinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)carbonyl)-2-methylpropyl)carbamate;methyl((1S)-1-cyclopropyl-2-((2S)-2-(5-(2-(4-(2-((2S)-1-((2S)-2-cyclopropyl-2-((methoxycarbonyl)amino)acetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-5-pyrimidinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxoethyl)carbamate;methyl((1S)-1-(((2S)-2-(5-(2-(4-(2-((2S)-1-((2R)-2-(diethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-5-pyrimidinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)carbonyl)-2-methylpropyl)carbamate;methyl((1S)-2-((2S)-2-(5-(2-(4-(2-((2S)-1-((2R)-2-(diethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-5-pyrimidinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-1-methyl-2-oxoethyl)carbamate;tert-butyl(2S)-2-(5-(4-(5-(2-((2S)-1-(tert-butoxycarbonyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyrimidinyl)phenyl)-4-(trifluoromethyl)-1H-imidazol-2-yl)-1-pyrrolidinecarboxylate;methyl((1R)-2-((2S)-2-(5-(4-(5-(2-((2S)-1-((2R)-2-((methoxycarbonyl)amino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyrimidinyl)phenyl)-4-(trifluoromethyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate;(1R)-2-((2S)-2-(5-(4-(5-(2-((2S)-1-((2R)-2-(diethylamino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyrimidinyl)phenyl)-4-(trifluoromethyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-N,N-diethyl-2-oxo-1-phenylethanamine;methyl((1S)-1-(((2S)-2-(5-(2-(4-(2-((2S)-1-((2S)-2-((methoxycarbonyl)amino)-3-methylbutanoyl)-2-pyrrolidinyl)-4-(trifluoromethyl)-1H-imidazol-5-yl)phenyl)-5-pyrimidinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)carbonyl)-2-methylpropyl)carbamate;methyl((1S)-1-cyclopropyl-2-((2S)-2-(5-(4-(5-(2-((2S)-1-((2S)-2-cyclopropyl-2-((methoxycarbonyl)amino)acetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyrimidinyl)phenyl)-4-(trifluoromethyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxoethyl)carbamate;methyl((1S)-2-((2S)-2-(5-(4-(5-(2-((2S)-1-(N-(methoxycarbonyl)-L-alanyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyrimidinyl)phenyl)-4-(trifluoromethyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-1-methyl-2-oxoethyl)carbamate;(2R)-1-((2S)-2-(5-(4-(5-(2-((2S)-1-((2R)-2-(diethylamino)propanoyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyrimidinyl)phenyl)-4-(trifluoromethyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-N,N-diethyl-1-oxo-2-propanamine;tert-butyl(2S)-2-(5-(2-(4-(2-((2S)-1-(tert-butoxycarbonyl)-2-pyrrolidinyl)-1H-imidazol-4-yl)-3-fluorophenyl)-5-pyrimidinyl)-1H-imidazol-2-yl)-1-pyrrolidinecarboxylate;2-(3-fluoro-4-(2-((2S)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-5-(2-((2S)-2-pyrrolidinyl)-1H-imidazol-5-yl)pyrimidine;methyl((1S)-2-((2S)-2-(5-(2-fluoro-4-(5-(2-((2S)-1-(N-(methoxycarbonyl)-L-alanyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyrimidinyl)phenyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-1-methyl-2-oxoethyl)carbamate;methyl((1S)-1-(((2S)-2-(5-(2-fluoro-4-(5-(2-((2S)-1-((2S)-2-((methoxycarbonyl)amino)-3-methylbutanoyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyrimidinyl)phenyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)carbonyl)-2-methylpropyl)carbamate;methyl((1R)-2-((2S)-2-(5-(2-(3-fluoro-4-(2-((2S)-1-((2R)-2-((methoxycarbonyl)amino)-2-phenylacetyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)phenyl)-5-pyrimidinyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)-2-oxo-1-phenylethyl)carbamate;andmethyl((1S,2R)-1-(((2S)-2-(5-(2-fluoro-4-(5-(2-((2S)-1-(N-(methoxycarbonyl)-O-methyl-L-threonyl)-2-pyrrolidinyl)-1H-imidazol-5-yl)-2-pyrimidinyl)phenyl)-1H-imidazol-2-yl)-1-pyrrolidinyl)carbonyl)-2-methoxypropyl)carbamate;or a pharmaceutically acceptable salt thereof.
 18. A compound selectedfrom

or a pharmaceutically acceptable salt thereof.
 19. A compositioncomprising a compound of claim 1, or a pharmaceutically acceptable saltthereof, and a pharmaceutically acceptable carrier.
 20. The compositionof claim 19 further comprising one or two additional compounds havinganti-HCV activity.
 21. The composition of claim 20 wherein at least oneof the additional compounds is an interferon or a ribavirin.
 22. Thecomposition of claim 21 wherein the interferon is selected frominterferon alpha 2B, pegylated interferon alpha, consensus interferon,interferon alpha 2A, and lymphoblastiod interferon tau.
 23. Thecomposition of claim 20 wherein at least one of the additional compoundsis selected from interleukin 2, interleukin 6, interleukin 12, acompound that enhances the development of a type 1 helper T cellresponse, interfering RNA, anti-sense RNA, Imiqimod, ribavirin, aninosine 5′-monophospate dehydrogenase inhibitor, amantadine, andrimantadine.
 24. The composition of claim 20 wherein at least one of theadditional compounds is effective to inhibit the function of a targetselected from HCV metalloprotease, HCV serine protease, HCV polymerase,HCV helicase, HCV NS4B protein, HCV entry, HCV assembly, HCV egress, HCVNS5A protein, and IMPDH for the treatment of an HCV infection.
 25. Amethod of treating an HCV infection in a patient, comprisingadministering to the patient a therapeutically effective amount of acompound of claim 1, or a pharmaceutically acceptable salt thereof. 26.The method of claim 25 further comprising administering one or twoadditional compounds having anti-HCV activity prior to, after orsimultaneously with the compound of claim 1, or a pharmaceuticallyacceptable salt thereof.
 27. The method of claim 26 wherein at least oneof the additional compounds is an interferon or a ribavirin.
 28. Themethod of claim 27 wherein the interferon is selected from interferonalpha 2B, pegylated interferon alpha, consensus interferon, interferonalpha 2A, and lymphoblastiod interferon tau.
 29. The method of claim 26wherein at least one of the additional compounds is selected frominterleukin 2, interleukin 6, interleukin 12, a compound that enhancesthe development of a type 1 helper T cell response, interfering RNA,anti-sense RNA, Imiqimod, ribavirin, an inosine 5′-monophospatedehydrogenase inhibitor, amantadine, and rimantadine.
 30. The method ofclaim 26 wherein at least one of the additional compounds is effectiveto inhibit the function of a target selected from HCV metalloprotease,HCV serine protease, HCV polymerase, HCV helicase, HCV NS4B portein, HCVentry, HCV assembly, HCV egress, HCV NS5A protein, and IMPDH for thetreatment of an HCV infection.